Man Utd 2-2 Porto: Jonny Evans's clearance goes straight to Cristian Rodriguez who gives the visitors a shock fourth-minute lead

It lasts for only a little over 10 minutes as a bad back-pass from Bruno Alves allows Wayne Rooney to equalise for Man Utd

Undeterred, Porto continue to cause problems for United with Hulk among those who test their defence

Having scored twice against Aston Villa on Sunday, Cristiano Ronaldo tries to create something but the teams remain level at the interval

Striker Carlos Tevez comes off the bench and goes close to conceding a penalty before scoring what looks like being a late winner

Sadly for Man Utd it is not enough as Porto attack again and see substitute Mariano beat Edwin van der Sar to earn a fine draw

Villarreal 1-1 Arsenal: Marcos Senna hammers a sensational shot into the top corner as the Gunners make a bad start in Spain

Captain Cesc Fabregas looks to win control of midfield for Arsenal as he makes a return to his homeland

The visitors suffer another setback when goalkeeper Manuel Almunia is forced from the game by injury after a clash with Giuseppe Rossi

Arsene Wenger is made to make another change when William Gallas fails to respond to treatment and goes off shortly before half-time

Despite their problems, the English club battle on and equalise in the 66th minute when Emmanuel Adebayor hooks in an overhead volley

The Arsenal boss urges concentration as his side hold on for the draw that should see them start the second leg as favourites