ROME (Reuters) - Forwards Cristiano Ronaldo and Wayne Rooney scored as Manchester United clinically beat AS Roma 2-0 at the Stadio Olimpico on Tuesday in the first leg of their Champions League quarter-final.

Portugal winger Ronaldo soared in the area six minutes before the break to head home a Paul Scholes cross after Rooney had skipped away from Philippe Mexes.

Rooney poked in the second goal in the 66th minute after a header from Korean midfielder Ji-Sung Park sparked a goalmouth scramble.

Roma had nothing to show for some fluid football and have a massive task in next Wednesday's return at Old Trafford, where they lost 7-1 at the same stage of the competition last season.