Juande Ramos' side also gave Liverpool a scare earlier when Gonzalo Higuain put in the rebound after Sergio Ramos' header was parried away, but the effort was disallowed for offside.

Sporting kept Bayern at bay for 41 minutes until Franck Ribery beat two defenders and fire a shot past Tiago. But Bayern went riot after the restart as Miroslav Klose made it 2-0, Ribery added his second from the spot and Luca Toni scored a double within the remaining seven minutes to complete a miserable night for the hosts.

Didier Drogba's early goal gave Chelsea a slender advantage over Juventus after a tight encounter, but former Chelsea coach Claudio Ranieri will have real hope for the second leg in Turin.

Drogba slid home Salomon Kalou's pass after 13 minutes to hand coach Guus Hiddink a second successive win since taking charge.

Juventus gave Chelsea anxious moments, with keeper Petr Cech saving brilliantly from Alessandro del Piero and Pavel Nedved just off target late on, but Chelsea held on to win.

On Tuesday Arsenal became the only winning side after beating AS Roma 1-0. Manchester United missed great chances to settle for a goalless draw with Inter Milan.

Barcelona managed a 1-1 draw at Lyon thanks to Thierry Henry's second-half equalizer while Porto twice came from behind to level 2-2 at Atletico Madrid.

The second legs are being played in two weeks.

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