Giggs reached the mark thanks to a deflected free-kick in the second half to equalise Edin Dzeko's shock opener, paving the way for United to go on and clinch victory through Michael Carrick.

Ferguson told ITV: He's unbelievable. With all the superlatives and praise he's had over the years, I don't know how you can add to it. He's a marvellous player."

Ferguson said he was pleased with the standard of performance from his side, in particular the battling qualities they showed in coming back to beat a strong Bundesliga outfit.

Ferguson added: "Their goal was a surprise but I thought it was a matter of time before we scored. We got a bit fortuitous for our goal with the deflection but the performance deserved it.

"I thought it was a very good performance. What they are good at is they never give in. No matter what the score is, they keep playing and they get their reward. Our performance level was very good."

On Michael Owen, who limped off in the first half with a groin complaint, Ferguson added: "Groins are difficult to say - he could be out for maybe two to three weeks. But his fitness level is good so it shouldn't be too long."

Giggs told ITV1: "It was a poor free-kick to be fair but we got that little bit of luck.

"(The goal) doesn't represent anything, obviously I'm proud to do it but it was more important that we got back in the game so soon after they scored."

Summing up the team's showing, Giggs added: "It was a good performance, in the final third we were lacking that quality pass. We got that little bit of luck after they scored and showed great character to come back."