John Lloyd says Andy Murray's valiant performance in the Australian Open semi-finals has convinced him the Scot will one day win a Grand Slam title.
Murray narrowly lost a five-set thriller to world number one Novak Djokovic in Melbourne on Friday.
"After seeing this match, now I'm more convinced than ever he will win a Grand Slam," said BBC pundit Lloyd.
"This is a great start to the year and I would not be surprised if he wins a Slam by the end of this year."
Murray battled throughout a high quality encounter at the Rod Laver Arena, eventually succumbing to the Serb in just under five hours.
"The big thing I was looking at was about how he was going to compete mentally because we've seen him in Grand Slams when he loses his rag and he starts moaning and whining to his group," added Lloyd, who was a finalist at the 1977 Australian Open.
"But he didn't do that - he was very positive throughout and I thought his attitude was superb.
"I think [eight-time Grand Slam champion] Ivan Lendl has been an amazing help already to Murray's game mentally, and they've only just begun working together."
Murray fought back to take a 2-1 lead after losing the opening set, and recovered from a break down in the final set before Djokovic took it 7-5.
The 24-year-old Scot has reached at least the semi-finals of the last five Grand Slam tournaments, a run which included reaching last year's Australian Open final.
Lloyd continued: "The way he's got to see it, is that he played against the best player on the planet - who last year was so far better than anybody else.
"It was one of the best matches I've ever seen and I thought the standard was unbelievable.
"The retrieving abilities from both players, to get themselves from impossible situations and turn them into winning situations was unbelievable.
"It was an amazing tribute to both players," added Lloyd. "For almost five hours and in those type of temperatures, they were just magnificent."
Djokovic faces Rafael Nadal in Sunday's Australian Open final, while Murray will have to wait until the end of May for his next Grand Slam tilt, at the French Open.
"If he takes it the right way, which I think he will, he'll take it as huge encouragement," said Lloyd.
"Of course he's going to be disappointed for a while - who wouldn't be? But I think he'll turn it into a positive."