Manchester United boss Alex Ferguson is confident his side's double assault will be boosted by a fully-fit squad.

United eased into a Champions League semi-final showdown with Spanish giants Barcelona after they knocked out Roma last night.

It means United's final run-in is now littered with high-profile games as they look to repeat their double success of 1999.

The current Barclays Premier League champions first face Arsenal at Old Trafford on Sunday knowing a win would almost certainly spell the end of the Gunners' title challenge.

Towards the end of the month, United face three matches in seven days which could make-or-break their season as the last-four clash with Barca sandwiches a trip to title rival Chelsea.

By the time of the game at the Nou Camp on Wednesday, April 23rd, Ferguson is hoping to be at full strength, in stark contrast to last season when his side was hit by injury.

"We're looking forward to it, and hopefully by the time of the game we'll have a fully-fit squad to give us a chance," assessed Ferguson.

"We're carrying one or two injuries that's making us change things around too many times at the moment.

"But (Darren) Fletcher, (Nemanja) Vidic and Nani are on their way back, while (Louis) Saha has started training with us this week. So there are a lot of plusses."

Yet against Roma, Ferguson's players provided proof to their boss - if he needed it - that there is considerable strength in depth.

Going into the game against Roma with a 2-0 cushion from the first leg, Ferguson was able to start with Cristiano Ronaldo, Wayne Rooney and Paul Scholes on the bench.

In their place came Ji-Sung Park, Carlos Tevez and Owen Hargreaves and Ferguson could not have been more delighted with their performances.

"It's strange how things work out because two of my best players were Tevez and Park," added Ferguson. Tevez has a great habit of scoring single goals in games where you have to get one at a vital time.

"My man of the match, though, was Hargreaves. He was absolutely fantastic. But quite rightly we trust in all of our squad because they are good players. It tells me these players can play in any type of game."

Rio Ferdinand, who was a doubt after damaging his left foot in the 2-2 draw at Middlesbrough last Sunday, required three stitches at halftime for an injury to his right foot last night.

Ferguson has confirmed the imposing central defender will be fit to face Arsenal, as should Michael Carrick who came off with a calf injury 16 minutes from time.

"I think I took him off at the right time. We'll know in the next couple of days, but I think he'll be okay," remarked Ferguson.

After Arsenal's crushing 4-2 quarter-final defeat to Liverpool this week, Ferguson knows United will face a Gunners side intent on ensuring their season is not wrecked in the space of five days.

"Games against Arsenal are always keenly-fought matches. There is never a lot in it," added Ferguson.

"I've managed to keep Rooney, Ronaldo and Scholes all fresh for the game, so hopefully that will matter. It will be a great game, but we have to think of ourselves and make sure we're ready."