It followed his crucial score when Wales clinched the Grand Slam by beating France in Cardiff seven days ago.

Jones said: "Shane is world-class. Shaun Edwards [Wales defence coach] calls him a predator, which is a perfect description.

"When Shane gets just half-a-chance, he jumps on it."

Jones, Williams and several of their fellow Grand Slam stars made a victorious Millennium Stadium return as the Ospreys booked their second successive EDF final appearance against English heavyweights Leicester. But they had to work hard before subduing Saracens in a dress rehearsal for next month's Heineken Cup quarter-final clash between these teams at Vicarage Road.

Man-of-the-match Gavin Henson scored the game's critical try on 50 minutes, before replacement back-row forward Filo Tiatia and Williams killed Saracens off. Fly-half James Hook added two penalties and two conversions, booking a Twickenham appointment with the Tigers on April 12 and an opportunity to avenge last season's 41-35 defeat.

Ospreys coach Lyn Jones said: "We wanted to gel the boys back in after the Six Nations campaign, and that was a success. We need to push on to the next step now. We lost to Leicester by the narrowest of margins last season, and we have grown from that."

Ryan Jones added: "You have very few opportunities to win silverware in your club colours, and we have really grown as a group of individuals.

"It was hugely disappointing to lose to Leicester 12 months ago. But we have come a long way through the experiences we've had, and I am extremely confident in this group of individuals."

Saracens rugby director Alan Gaffney had no complaints about the Ospreys' emphatic success, with his team restricted to a solitary Glen Jackson penalty.

Gaffney said: "We didn't need luck - we needed about five extra players on the pitch! They are a classy team, and we've not experienced such a hammering since I have been at Saracens.

"This will be a huge learning curve for us. Ospreys' pressure was very good, and it put us under the hammer.

"We have got to do a bit of homework, but we believe we can turn it around (in the Heineken Cup). We wouldn't be in the competition otherwise."

Saracens scrum-half Neil de Kock and lock Chris Jack both failed to last the distance, with Gaffney confirming former All Blacks star Jack had gone to hospital for an x-ray on his hand.