World number one Jannik Sinner delivered a flawless performance to pulverise Czech Jiri Lehecka 6-0 6-1 6-2 in little more than 90 minutes on Saturday, to burst into the French Open fourth round and issue a ominous warning to other title contenders.
The 23-year-old Italian, who returned to tennis in May after a three-month-doping ban, won the first 11 games in a row, and has so far found no resistance
