Manchester - Mariano Gonzalez scored a late equaliser as Porto held Manchester United to a 2-2 draw in the first leg of their Champions League quarter final at Old Trafford on Tuesday.
The visitors took a fourth-minute lead through Cristian Rodriguez, only for a defensive howler to present Wayne Rooney with an equaliser 11 minutes later.
Substitute Carlos Tevez looked to have given United the win when he struck with five minutes remaining, but Mariano ghosted in at the back post to steal an equaliser three minuets later.