You cannot be serious? Line-judges are normally on the ball

TENNIS ace John McEnroe was wrong — tennis line-judges are remarkably sharp at pinpointing a ferocious forehand.

A review of challenges made in ATP (Association of Tennis Professionals) tournaments using data from Hawk-Eye, ‘the virtual umpire’, found officials were correct more often than players.

Only eight percent of “close calls” will be wrong in the average match, found Professor George Mather of Sussex University, Britain.