Uefa Champions League, Quarter-final second leg

Current champions Unitedhold on the Champions League hangs by a thread after Porto left Old Trafford with a darw and two crucial away goals .They have a mountain to climb as they have to win at Porto . Arsenal have a slight advantage of 1 away goal


Man Utd v Porto - Match of the day


United will be out to win at Porto to keep alive the dream of winning all trophies .United look vulnerable at the back and they have to regroup their defence . The injury to key players is the main reason for their slump in form

Porto will be trying to keep a clean sheet for their dream run.Memories of the Portuguese champions knocking United out at the last-16 stage in 2004 are still fresh in the memory for many Red Devils fans.Then under the guidance of Jose Mourinho, Porto grabbed a last-minute goal to draw 1-1 at the Theatre of Dreams to seal a 3-2 aggregate win, sending the 'Special One' dancing down the touchline. The Portuguese side went on to be crowned European champions that year but since then, this season is the first time they have progressed further than the first knockout round.



Arsenal v Villarreal


Arsenal and Villarreal have only been drawn against each other twice in European competition.The first leg of the quarter-final of this season's Champions League, resulted in a 1-1 draw. Marcos Senna scored the opener for Villarreal, Emmanuel Adebayor equalised.

Villarreal will be without influential midfielder Marcos Senna for this week's Champions League return leg with Arsenal because of injury.

The Spain international, 32, limped out of Saturday's 2-0 defeat by Malaga with a hamstring problem.

It is not known how long Senna will be sidelined but the Villarreal website states he will miss Wednesday's game at the Emirates Stadium.

Senna scored Villarreal's goal as they drew the first leg 1-1 with Arsenal.

The Primera Liga side could be severely under-strength in midfield, with Santi Cazorla an absentee and wingers, Cani and Mati Fernandez, also doubtful.

Meanwhile, Arsenal have a crisis in defence with Johan Djorou joining William Gallas on the injury list after he was stretchered off with a knee problem during the 4-1 win at Wigan.