Bohs were left licking their wounds the last time the rivals met in April. Having lost just once in their previous 11 league meetings against the Hoops, the Gypsies were humbled 4-0 at Dalymount Park.

The eventual collapse hinged on the concession of two goals either side of half-time. Up until the opener, Long’s men had been on top for most of the opening half.

A lot has changed at Rovers since, with Stephen Bradley taking the reins as caretaker manager earlier this month after the departure of Pat Fenlon.

Long said: “We gave away a silly free-kick to concede just before half-time having been the better side before that. We come back out, hit the crossbar and then they go 2-0 up on the break.

“What happened after that was what was most disappointing. The wheels came off as we went chasing the game.

“But none of that comes into our thought process ahead of this game. We can’t be looking at it as a chance for revenge or we’ll come unstuck.

“It’s a different game. Rovers have new management and both sides will be well up for it.”

The Gypsies come into the game in good form but Long was left frustrated that his side could not secure all three points last time out as a battered Bray Wanderers came away from Dalymount with a 0-0 draw.

He added: “We just couldn’t capitalise and put the ball in the net. With the amount of chances we created, we would have been well worthy of the three points.

“We need to be more clinical. We created a lot of one-on-one chances but the fact that their keeper Peter Cherrie was man of the match said it all.

“We put together some very good passages of play at times so the signs are there that our performances are improving.

“But it is disappointing that we’re not going into this game with another three points behind us.”

Long’s options have been limited by injuries sustained by Stephen Best (knee) and Lorcan Fitzgerald (ankle) during last week’s 2-0 friendly defeat to Portsmouth.

It had been feared that Best had suffered a cruciate injury, but a scan on Monday instead confirmed knee tendon damage that will rule him out for up to a month.

Dan Byrne (hamstring), Paddy Kavanagh (ankle) and Ayman Ben Mohamed are also considered major doubts.

Better news for Bohs was Ian Morris making his debut for the club against Portsmouth, while Jake Kelly (shoulder), who had been out for a month, also played 60 minutes in the same game.

“We really enjoyed the game in Sligo on Wednesday. It was great to see old friends and faces, and I’m sure it will be the same against Bohemians.”

During five years in charge of Sligo Rovers, Cook enjoyed many memorable battles with the Gypsies.

In 2009, Bohs’ 3-1 victory over Cook’s Bit O’Red all but secured a second league title in a row for Pat Fenlon’s team.

But in the FAI Cup, it was Cook who enjoyed the bragging rights.

His side dumped Bohs out of the competition three years running – first in the quarter-finals in 2009 and then at the semi-final stage in 2010 and 2011 on their way to winning the trophy two years in a row.

Cook said: “They were great battles with a bit of edge – two of those went to replays.

“We’re really looking forward to Bohemians now. It’ll be great to get back to Dalymount. Bohs always gave us a tough game so I expect nothing less tomorrow.”

When Cook left Ireland in 2012 to take charge of Accrington Stanley, both Bohemians and Dalymount Park faced uncertain futures as the reality of the club’s crippling debts hit home.

But Dublin City Council’s decision last year to purchase Dalymount Park with the intention of redeveloping the stadium means things are looking up again.

Cook added: “I know it’s been a tough few years for everyone at Bohs. I was delighted to hear that both the club and Dalymount had been saved.

“When you look back at the games that have been played at Dalymount over the years, it’s a ground steeped in history. It would have been a huge loss to football had it gone.

“It’s a credit to the fans and everyone at the club that it’s been saved and hopefully the community will get behind them now.”

Tickets for tomorrow’s friendly are priced at €10 for adults and €5 for concession/students/children. They can be purchased from tickets.ie or at the turnstiles tomorrow.

Last week’s trip to face bottom-of-the-table Longford was viewed as a potential banana skin and Long was relieved to see his side get over the line.

He said: “We didn’t necessarily play particularly well. But we did what we had to do. Longford are desperate for points and they threw everything at us.

“We were in control of the game in the first half, less so in the second half. We were left hanging on for the three points in the end as we could not add another goal but we got them.

“We know we can pass it better and show more quality on the ball.

“But ultimately we were pleased with the result, especially when you see them go up and score three times and be so unlucky to lose against Dundalk on Tuesday.”

Long is again wary by the threat posed by the Seagulls.

Harry Kenny’s side thumped Wexford Youths 3-0 last Saturday, which made it three league games unbeaten and three games without conceding.

Long said: “Harry’s come in and done well. They’re unbeaten in three, have strengthened their squad and they will be dangerous opponents.

“It will be another tough game – there’s a few ex-Bohs players in their squad too which always makes it interesting.”

Bohs were earlier this week strengthened by the addition of Ian Morris to the first team.

After spells with St Patrick’s Athletic and Glenavon, the midfielder joined the club as Youth Development Officer in April.

The 29-year-old previously lined out for Leeds United, Scunthorpe United, Torquay United and Northampton Town during a 10-year career in England.

Long added: “Ian’s played well over 200 games at a good level in England. You don’t survive that long in the Football League without being an excellent professional.

“He’s still only 29 too – himself and Shane Supple played on the same Ireland underage teams – so he has loads to offer. He gives us options in various positions but I would expect Ian to feature for us primarily in midfield.

“He can add to what we do on the pitch but also to the culture off it. You want professional people with a professional mindset pushing standards.

“The club are already seeing his worth in the youth section and he can give the first team a big boost too.”

Dan Byrne (hamstring) is a doubt. Jake Kelly (shoulder) has returned to training but remains doubtful. Dave Mulcahy (virus) is available again.

Goalkeeper Lee Steacy has left the club to join tomorrow’s opposition.

Long said: “Our ambition at the start of the season was to consolidate and hopefully build on last year’s position.

“That is still our ambition but we can’t spend our time distracting ourselves by looking at the table. Ultimately it’s the same each week – we have got to go out and try win our next game.

“It’s not going to be easy. We have to work hard and give a performance.”

Saturday’s opposition Longford Town are just a point adrift at the bottom of the table but have not won since the opening day of the season.

Regardless of going 15 league games without victory, Long is not taking the trip to the Midlands for granted.

He said: “It doesn’t matter who you play in this league, every team is capable of giving you a game.

“They’re down the bottom of the table, they know they need to start winning and they will be scrapping for points.

“Tony Cousins will have them throwing the kitchen sink at us and we have to be prepared for that.”

Last Friday’s 1-1 draw with Galway United after the mid-season break extended Bohs’ unbeaten run but Long felt it was a missed opportunity to claim all three points.

He added: “The danger after three weeks without a game is that you don’t come into a game at full tilt.

“But in fairness, we had trained hard, we did start brightly and should have gone 2-0 ahead, which would have been a different game.

“But after that initial spell of 20 minutes, Galway came back into it and equalised.

“We made changes in the second half and in the last 25 minutes, we looked like the only team who could win it and a decent shout for a penalty too.”

Bohs are once again without Jake Kelly (shoulder) but he has been given the all-clear to return to training. Dave Mulcahy (virus) is a doubt.

Bohs lie eighth on 17 points, while Tommy Dunne’s Tribesmen are five points ahead in fifth.

Long said: “Galway are ahead of us but we’re looking upwards now. We want to hit the ground running.

“Confidence is high and if we play to our strengths, we can move up the table.

“It’s important we get off to a good start. We were slow starting after the mid-season break last year – that can’t happen again.”

The last time these sides met marked a turnaround in Bohs’ season.

Having lost 1-0 to Galway at Eamon Deacy Park in April, Bohs made amends with a crucial 2-0 victory in the cup at Dalymount Park last month.

That win ended a run that had seen Bohs fail to win or score in seven games in all competitions.

Long added: “It was a huge game for us as our league form wasn’t great going into that game.

“You can see how much confidence the players took from that result. We’ve done very well since, but this will be a different game.”

Bohs welcome back Paddy Kavanagh (ankle) and Ayman Ben Mohamed (international duty). But Jake Kelly (shoulder) remains unavailable.

Goalkeeper Shane Supple joins the squad having been signed from Crumlin Utd, but defender Paul Rooney has left to join Millwall.

Meanwhile, due to a clash with St Patrick Athletic’s Europa League game, Tuesday’s ‪Leinster Senior Cup final between Bohemians and Wexford Youths has been postponed.