Jannik Sinner is still regaining his focus on the tennis court after his three-month doping ban. The world No. 1 overcame a brief lapse during the first set of a 6-4, 6-2 victory over No. 93 Dutch qualifier Jesper De Jong in his second match back on tour in front of his home crowd at the Italian Open on Monday.

Jannik Sinner cruised into the last 16 of the Italian Open on Monday after comfortably beating lucky loser Jesper de Jong 6-4, 6-2 in front of a delighted crowd in Rome. Sinner threw away a three-game lead when 4-1 up in the first set before eventually going ahead in the match but he saw out the contest with little fuss,

As Jannik Sinner prepares to return from his doping ban, there are still major questions to be answered about the process that led to such different outcomes for the world number one and Australia's Max Purcell.