World number one Jannik Sinner extended his Masters 1000 winning streak to 31 matches, equalling Novak Djokovic's all-time record, with a 6-2, 6-3 victory over unseeded compatriot Andrea Pellegrino in the round of 16 of the Italian Open on Tuesday.The 24-year-old four-time grand slam champion was ruthless early on, racing into a 4-0 lead before Pellegrino got on the scoreboard.Pellegrino showed greater resistance in the second set, drawing level at 3-3, but Sinner broke for 4-3 and closed out the match comfortably.Sinner struck 13 winners in a contest that lasted one hour and 29 minutes."I'm very happy about the outcome Hopefully I'm ready for the quarter-finals."Earlier this month, Sinner became the first man to win five consecutive Masters 1000 titles when he lifted the Madrid Open trophy, adding to his recent triumphs in Paris, Indian Wells, Miami and Monte Carlo.With only Rome missing from his collection, Sinner is aiming to go one better than last year, when he was beaten in the final by Carlos Alcaraz.Alcaraz, a seven-time major winner, is nursing a wrist injury and will not compete in the French Open.If Sinner goes on to claim the Rome title, he will join Djokovic as the only men to have won all nine Masters 1000 events."I think I can be very happy