By Paul Milligan PUBLISHED: 14:21 EST, 2 April 2012 | UPDATED: 06:44 EST, 3 April 2012 A racquet smashed by tennis star John McEnroe at Wimbledon, in one of his famous anger outbursts, could be worth up to £15,000 for its schoolboy owner. Sam Matthews’ mother Linda was given the broken racquet by McEnroe more than 30 years ago when he rented a flat from her. In 2005, Sam, then aged 10, took it to a children’s version of the BBC’s Antiques Roadshow. Sam Matthews with a smashed-up old tennis racquet of John McEnroe's he hopes could be worth up to £15,000. The player presented it to his mother Linda when he rented a flat from her over 30 years ago
@highlight
McEnroe gave racquet to Linda Matthews over 30 years ago when he rented flat from her
@highlight
Her son Sam had its authenticity verified by player on Antiques Roadshow
@placeholder, now 17, was delighted to learn the racquet is an antique worth a five-figure sum.