US Open champion Justin Rose can go on to win multiple majors, according to Tony Jacklin.
Jacklin was the last Englishman to win the event when he was the champion in 1970 before Rose triumphed on Sunday.
Jacklin, the two-time major champion, believes the victory could give Rose the confidence to win more major's in the future.
"It's all about confidence and I've no reason to believe he couldn't win four or five majors," Jacklin told BBC Radio 5 live.
Rose became the first English winner of any major since Nick Faldo's Masters victory in 1996. The 32-year old triumphed at the Merion course to hold off the challenge of Phil Mickelson, who has now finished runner-up six-times. Rose made par on the final two holes, regarded the toughest two holes of the course.
He finished like a true champion," said Jacklin.
"It takes a lot of courage to win a major championship. You have to stay in the moment, which sounds very easy but when the stakes are high it's very hard.
"To come through it is fantastic and I was proud of him. He's a good guy, he's good for the game.
"Merion was the great examination it's supposed to be - it was fantastic."
Rose broke onto the golfing scene as a 17-year old amateur during the same event he has just won. He finished tied fourth in the 1998 event at Royal Birkdale. A magnificent chip on the 18th hole secured a birdie and rounded off a fantastic tournament for the youngster.
But after turning professional Rose missed 21 consecutive cuts before eventually winning his first professional event in 2002.
Jacklin knows what Rose has been through and is pleased to see the South-African born player finally get his reward.
"I was thrilled for him. I know what he's gone through in his professional life," said Jacklin.
"I was obviously around when he had that audacious chip in at Birkdale at 17 and witnessed the difficult time he had after turning pro and all the struggles that he had.
"To fight through that, it takes a lot of courage. What was shown at Merion was exactly that."
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