Arsenal and Manchester City face monumental tasks when they visit European powerhouses Bayern Munich and Barcelona looking to overturn 2-0 deficits in the second legs of their Champions League last-16 ties.

Arsenal must overcome Pep Guardiola and his red-hot Bayern side at the Allianz Arena today after goals from Toni Kroos and Thomas Mueller condemned them to defeat in the first leg at the Emirates Stadium last month.

City, meanwhile, travel to the Nou Camp tomorrow with their own mountain to climb after goals from Lionel Messi and Dani Alves gave Barcelona a commanding advantage midway through the tie.

In the week’s other last-16 ties, Atletico Madrid face Milan at the Vicente Calderon with a 1-0 lead tonight before Paris St Germain host Bayer Leverkusen at the Parc des Princes tomorrow with a 4-0 advantage after the first leg.

Arsenal have the unenviable task of trying to become only the second team to beat the runaway Bundesliga leaders at home this season.

The Gunners can take heart from last season’s visit to the same venue where they won 2-0 and only failed to make it through to the quarter-finals by virtue of an away goal after Bayern had won the first leg 3-1 in London.

Arsene Wenger will be buoyed by his team’s 4-1 win over Everton in the FA Cup quarter-finals on Saturday, which represents their most realistic chance of a trophy this season.

“Psychologically, it puts us in a good mind for Munich,” said Wenger.

“We can be inspired by our focus and our desire. It was a high-quality performance from the first minute to the last and we can go to Bayern in the same spirit.

“The statistics are against us, but let’s make sure that the performance goes for us, and then we have a chance.”

Wenger was pleased by the display of Mesut Ozil who scored the opening goal, provided the assist for Arsenal’s fourth and put in a vastly improved performance ahead of the must-win second leg.

“I think the goal was important for him,” said Wenger.

“You sometimes want him to take more of a chance because he always looks for the good pass.

“He also did a lot of what you would call ‘dirty work’. He tracked back a lot on counter-attacks and when he behaves like that you have a better chance to win the game.”

Less Pellegrini

Manchester City’s task against Barcelona is every bit as difficult and they will have to do it without manager Manuel Pellegrini who will be serving the first game of a two-match touchline ban at the Camp Nou tonight.

The Chilean was punished after remarks he made about Swedish referee Jonas Eriksson, claiming some of the official’s decisions in the first leg were “not impartial”.

In tomorrow’s other game Paris St Germain, top of Ligue 1, host Bayer Leverkusen, third in the Bundesliga, comfortable in the knowledge that only a monumental turnaround will prevent them reaching their second successive quarter-final.

Zlatan Ibrahimovic has been in imperious form in the competition so far scoring ten goals, including two in the first leg, to trail only Cristiano Ronaldo in the competition’s goalscoring charts this season.

La Liga title contenders Atletico Madrid will be confident of progressing after a late Diego Costa header gave them a priceless away goal to take back to Madrid.

Milan, who have been crowned European champions seven times, are having a forgettable season languishing in tenth in Serie A, 37 points behind leaders Juventus.

Milan coach Clarence Seedorf was confident his team could rise to the occasion.

“With courage, this kind of optimism and a little more luck we are about to turn everything around, I’m sure of it,” Seedorf said.

Round of 16, second legs

Playing today
Atletico Madrid (Spain) vs Milan (Italy) - (1-0)
Bayern Munich (Germany) vs Arsenal (England) - (2-0)

Tomorrow
Barcelona (Spain) vs Manchester City (England) - (2-0)
Paris St Germain (France) vs Bayer Leverkusen (Germany) - (4-0)

March 18
Chelsea (England) vs Galatasaray (Turkey) - (1-1)
Real Madrid (Spain) vs Schalke (Germany) - (6-1)

March 19
Borussia Dortmund (Germany) vs Zenit SP (Russia) - (4-2)
Manchester United (England) vs Olympiakos (Greece) - (0-2)

Note: In brackets results first legs.