Champions League round-up
Barcelona came from behind to beat Celtic 3-2 in the first leg of their UEFA Champions League tie, Arsenal were frustrated by Milan, and Carlos Tevez rescued a late 1-1 draw for Manchester United against Lyon.
Celtic twice took the lead at Parkhead but Barcelona controlled long periods of the game and Lionel Messi produced a stunning performance to put the Spanish side in full control going into the second leg at Camp Nou.
Manchester United will also feel confident of progressing to the quarter-finals after netting a vital away goal with just three minutes remaining at Stade Gerland, but Arsenal were held to a goalless draw by Milan and travel to Italy with the tie still in the balance.
The clash between Fenerbahce and Sevilla is also delicately poised at the halfway stage after the Turkish side edged a five-goal thriller at Sukru Saracoglu Stadium.
Manchester United crushed Arsenal 4-0 in the FA Cup at the weekend and were looking to continue their stunning form with the likes of Cristiano Ronaldo and Ryan Giggs back in the line-up.
United carved out the clearest opportunities in the first 45 minutes of their clash with Lyon but could not find the killer touch.
Wayne Rooney attempted to lift a shot over Gregory Coupet when through on goal but the French goalkeeper pulled off an excellent save.
Giggs, on his 100th Champions League appearance, played in Paul Scholes moments later but his fellow midfielder's shot was well blocked by Jean-Alain Boumsong.
Lyon had rarely threatened when Karim Benzema, who has been linked with United, scored on 54 minutes with a fierce strike into the bottom left corner from 20 yards.
Alain Perrin had been confident that United would give his side chances and Juninho Pernambucano nearly made it 2-0 with a 40-yard free-kick that Edwin van der Sar misjudged, but his effort flew just wide of the post.
Wayne Rooney's tap-in was ruled out for offside but United kept pressing and drew level in the 87th minute when Lyon failed to clear Nani's cross and Tevez scored from close range.
Arsenal were dealt a major blow inside the opening ten minutes of their game against Milan when Kolo Toure was forced off with an injury and replaced by Philippe Senderos.
Jens Lehmann reacted quickly to palm away a Paolo Maldini header but otherwise Arsenal were untroubled in the first half, with Brazilian starlet Alexandre Pato showing plenty of promise but lacking support.
The Gunners, however, were also struggling to break down Milan's resilient defence and were mostly restricted to ambitious shots from distance.
Arsene Wenger's side clicked into gear after the break and put Milan under severe pressure, but Emmanuel Adebayor saw a goal disallowed for offside and Emmanuel Eboue dragged an effort just wide.
Arsenal continued to dominate but were denied a last-gasp winner as Adebayor headed against the crossbar, and Milan will now hope to finish the job at home early next month.
Celtic went into their game against Barcelona with a formidable home record in the Champions League, and they withstood an early onslaught to break away and take the lead on 16 minutes as Jan Vennegoor of Hesselink headed home Lee Naylor's cross.
Gordon Strachan had promised an unbeatable atmosphere at Parkhead but the crowd was briefly silenced just two minutes later when Lionel Messi exchanged passes with Deco and slammed a shot past Artur Boruc.
Barry Robson restored Celtic's advantage seven minutes before half-time. Aiden McGeady delivered the cross and Robson, on his Champions League debut, snapped his neck to send a looping header over a floundering Victor Valdes.
Celtic were pegged back for a second time just after the interval when Gary Caldwell surrendered possession on the edge of the area and Thierry Henry curled a shot into the top corner in trademark style.
Not content with two away goals, Barcelona poured forward and were rewarded 11 minutes from time when Messi capitalised on a mix-up in the Celtic defence to bamboozle Caldwell and then stroke the ball coolly home.
Fenerbahce, in the knockout stages of the competition for the first time, took the lead against Sevilla in the 17th minute as former Chelsea striker Mateja Kezman stole in between two defenders and scored with a free header from Ugur Boral's pinpoint cross.
Sevilla, winners of the Uefa Cup for the past two seasons, levelled six minutes later when Edu stretched to intercept a dangerous delivery from Daniel Alves and only succeeded in stabbing the ball beyond his own goalkeeper.
Diego Lugano nodded the Turkish side back in front after 57 minutes but Julien Escude netted Sevilla's second equaliser in the 66th minute with a neat finish from Christian Poulsen's assist.
The drama was not over and Fenerbahce made it 3-2 three minutes from time when Semih Senturk's deflected shot found a way past Andres Palop.