uefa.com rounds up the weekend's injury news that affects the 16 clubs in UEFA Champions League first knockout round second-leg action this week.
Real Madrid CF (1) v (1) FC Bayern München
Madrid striker Ronaldo tore a hamstring in his left leg in Saturday's draw with Real Racing Club Santander and joins the suspended Roberto Carlos on the sidelines for Wednesday. Madrid rested Raúl González and he should play, but Francisco Pavón (gastroenteritis) and Guti (flu) are fresh worries. Bayern are hoping that Willy Sagnol will be fit despite fracturing his arm in Saturday's 3-1 victory against Bayer 04 Leverkusen. They may also have Bixente Lizarazu back after promising progress on his damaged thigh muscle.
Arsenal FC (3) v (2) RC Celta de Vigo
The news is better for Arsenal and Celta, who meet on Wednesday in London. Arsenal were able to rest Dennis Bergkamp and Robert Pires at the weekend, although Sylvain Wiltord (ankle) and Ray Parlour (knee) are still missing. Young striker Jérémie Aliadière has thigh trouble but could make the bench. Celta, meanwhile, may be able to call on goalkeeper Pablo Cavallero, despite his broken nose, and midfield player Jesuli.
AC Milan (0) v (0) AC Sparta Praha
Despite picking up slight muscle injuries in Sunday's victory over UC Sampdoria, Clarence Seedorf and Gennaro Gattuso should both figure for Milan against Sparta on Wednesday. The Czech side have concerns over the fitness of Lukáš Zelenka but he should play while young striker Tomáš Jun made his first appearance of 2004 on Saturday.
AS Monaco FC (1) v (2) FC Lokomotiv Moskva
Ludovic Giuly and Sébastien Squillaci are definitely missing for Monaco but Fernando Morientes should be fit. Lokomotiv have worries over three key players - midfield players Marat Izmailov and Dmitri Khokhlov have leg and back injuries respectively while Dmitri Sennikov may be able to play with a broken nose but will need to wear a mask. Definitely out of Wednesday's match is striker Maxim Buznikin (foot).
Manchester United FC (1) v (2) FC Porto
United are banking on defender Mikaël Silvestre being fit by Tuesday night, after the Frenchman's rapid recovery from an ankle injury. The English champions are definitely without the suspended Roy Keane. Porto have no fresh injury worries following Friday's 4-1 win against CF Os Belenenses, when Benni McCarthy scored twice.
Chelsea FC (1) v (0) VfB Stuttgart
Chelsea have positive news ahead of Stuttgart's visit after winger Damien Duff came through a reserve match last week and the London club had a restful weekend with no competitive match. Stuttgart saw Silvio Meissner return to action in Saturday's 2-0 win at BV Borussia Dortmund.
Olympique Lyonnais (1) v (0) Real Socided de Fútbol Raynald Denoueix takes his Real team to France for Tuesday night's match without goalkeeper Sander Westerveld and Agustín Aranzabal who have a fractured finger and broken nose respectively. Yet there is good news for the Spaniards with Javier De Pedro returning. Lyon have a trio of concerns. Eric Carrière was hurt in Friday 4-0 defeat of AC Ajaccio while Jérémie Berthod and Anthony Réveillère are also doubts, with the latter's calf problem causing most concern.
Juventus FC (0) v (1) RC Deportivo La Coruña
As well as losing Mark Iuliano to a thigh injury sustained in Saturday's win at Brescia Calcio, Juventus may also be without defenders Gianluca Zambrotta and Alessandro Birindelli, both of whom missed the Bresica match with muscle injuries. Definitely out are David Trezeguet (shoulder) and Antonio Conte (suspended). Deportivo travel without Enrique Romero but Nourredine Naybet, Víctor Sánchez and Djalminha all have a chance of playing.
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