Ryan Giggs ran over 10,000m and Wayne Rooney says Bayer Leverkusen defender couldn't believe he's still playing

Wayne Rooney has revealed even the Bayer Leverkusen players were staggered at how Ryan Giggs managed to defy the years in the Champions League.

Giggs celebrates his 40th birthday on Friday, basking in the afterglow of another superb display in Wednesday's 5-0 romp at the BayArena.

Sami Hyypia's men simply had no answer to the Welshman's class and  wondered how it was possible - Giggs ran 10,916m in the game and only two of his team-mates ran further.

'I've run out of things to say about Ryan,' Rooney said.

'Actually, during the game, the Bayer centre half was asking how he is still playing at that age.

'I certainly won't be playing at that age, that's for sure. His composure on the ball is great.'

With Giggs still capable of performing at such a high level, he might not even get his birthday weekend off given United visit Tottenham on Sunday needing to get their Barclays Premier League campaign back on track.

Sunday will certainly not be a day of rest for Rooney. Not after his four assists in what turned out to be United's biggest away win in Europe since 1964, and a victory margin they have exceeded only once on their travels to the continent in their entire history.

'It's a team game but it's always great when you can help your team-mates score goals,' Rooney said. 'It was a perfect away match.

'We played very well, we defended well, there was some great counter-attacking football, we played with power, pace and composure.

'It was really as good an away performance as you can get.'

Rooney also had words of praise for Shinji Kagawa, who revelled in his central position after being given the rare opportunity of operating bin his preferred 'No 10' role.

United have now booked their place in the last 16, although they do need a point when they face Shakhtar Donetsk at Old Trafford in a fortnight to ensure they progress as group winners.

Before that is the clash with Tottenham at White Hart Lane. Spurs are still smarting from that humiliating 6-0 spanking at Manchester City on Sunday.

Yet United can hardly afford to be charitable after they coughed up a last-minute equaliser and two points at Cardiff a couple of hours later.

'Obviously, it was disappointing to lose a goal towards the end at Cardiff (last Sunday),' Rooney said. 'We didn't play as well as we can.

'So, whilst we are all delighted to put on a great performance in the Champions League, now we are looking forward to playing Spurs.'

Covering the distance

Champions League metres per minute average this season: 
Wayne Rooney: 124.6
Ryan Giggs: 122.6
Antonio Valencia: 119.4