"We must score a goal and make sure that Fiorentina don't score."   

On paper, Bayern look clear favorites for the round of 16 first leg Champions League clash against the struggling, under-strength Italian club, with 12 straight wins in all competitions behind them.

Coach Louis van Gaal said Tuesday that Germany striker Miroslav Klose was fit for selection again after a lay-off for injury, meaning Bayern, who last won the Champions League in 2001, are now back at full strength.

French star Franck Ribery made his first Bundesliga start in four months on Saturday in a 3-1 home win against Borussia Dortmund that left them level on points with Bayer Leverkusen at the top of the league.

They trail by the slenderest of margins on goal difference — 30 to 29.

Fiorentina, meanwhile, have gone five games without a win in Serie A, were beaten in the first leg of the Italian Cup semi-finals by Inter Milan earlier this month and slumping to 11th in the league.

However, the Italians have found an extra dimension in European competition and topped their Champions League group with five straight wins, including a 2-1 victory against Liverpool at Anfield to complete a double over the Reds.

Defender Alessandro Gamberini was set to miss the match through a shoulder injury. Midfielder Cristiano Zanetti is training again after undergoing knee surgery but was also not due to make the trip to Germany.

Romanian striker Adrian Mutu is serving a provisional suspension for failing drugs tests.

Van Gaal warned against over-confidence, however.

"One single player isn't that important. We've won games without Ribery and Robben," he told a news conference on Tuesday.
 
Arsenal confident after beating Liverpool

In Lisbon,  Arsenal are brimming with confidence after beating Liverpool but they will have to show consistency to overcome in-form Porto in the Champions League last 16.

The north London team's run of wins was interrupted recently by losses to Chelsea and Manchester United but they won 1-0 against Liverpool last week, a result which kept them in the title race and lifted their spirits.

"It would have been very difficult for us to lose against Liverpool and go to Porto feeling confident," said coach Arsene Wenger.

The draw for the Champions League first knockout round could have been tougher for Arsenal, pitting them against Bayern Munich or one of the Milan giants, but Wenger said Porto could be tricky.

"Porto is a tough draw. They don't look like a prestigious team but every year they are in there and they can surprise people. They have been playing very well recently."   Porto's pedigree, which includes two European titles, has been clear in recent displays against English sides.

They lost 4-0 at the Emirates last season but then topped the group and gave United a tough time in the quarter-finals.

Losses against Chelsea this season were close matches that could have ended in draws.

"Arsenal are the English team that can trouble us most. When they are well, they play a game that is hard to overcome," Porto coach Jesualdo Ferreira said.

"But their form can oscillate. On a good day we can cause them problems."   Porto are third in the domestic league, having started badly, and have struggled to replace influential midfielder Lucho Gonzalez, who was sold to Marseille.

Their 0-0 draw against Leixoes on Saturday belied a strong performance and followed a run of fluid and commanding wins.    Much of this has been thanks to Ruben Micael, a creative midfielder who has revitalized the team since joining from Nacional in January.   With skilful Argentine Belluschi and ball-winner Fernando alongside Micael, Porto have a midfield with technique and guile.

In attack, they have replaced Lisandro Lopez with another prolific goalscorer, Colombian Radamel Falcao, while Silvestre Varela is a threat on the wings. Burly Brazilian forward Hulk, suspended since December, has been called up and could come off the bench.

Arsenal have Russian striker Andrei Arshavin out with a hamstring problem and Alex Song in doubt with a knee injury.