The Premiership was the second part of Leicester's possible treble

Former Leicester centre Will Greenwood says he cannot see any way Wasps can stop the Tigers completing a remarkable treble in Sunday's Heineken Cup final.

Pat Howard's side have won the EDF Energy Cup and Premiership and Greenwood says they will be too strong.

"Wasps have some old guys who will think in a big game they can stand toe-to-toe with Leicester," he said.

"But the consistency they've brought onto the field recently makes them clear favourites. They're unstoppable."

Greenwood said the fact Wasps had not played for three weeks would also count against them.

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Defeat by Leicester in the last game of the regular season cost Wasps a place in the play-offs, which the Tigers went on to win.

And Greenwood said there was a fine line between being rested and being rusty.

"One week's rest is always good, two weeks and you start to twiddle your thumbs, so we'll see how they've managed with three," he said.

Both teams have had their hands on the trophy in recent years

"Wasps do need to start well, because Leicester have been so powerful at the start of games that if they start rusty, the game will be gone before it's started."

If Leicester do win the Heineken Cup for the third time, it will round off a remarkable finale for coach Howard before he returns home to Australia, leaving behind a full trophy cabinet at Welford Road.

And if they do manage to win their third trophy of the season, Greenwood, who was in the Tigers side beaten by Brive in the 1997 final, says it will be a stunning achievement.

"You'd run out of hyperboles if they do the treble," he said. "To be battling for three trophies on the final day - whether you love them or loathe them - you have to take your hat off and applaud."