NEW YORK: Novak Djokovic moved within two matches of completing the first men's singles calendar-year Grand Slam in 52 years on Wednesday, rallying to defeat Italian Matteo Berrettini in a US Open quarter-final.

Top-ranked Djokovic stretched his Grand Slam win streak to 26 matches by eliminating sixth seed Berrettini 5-7, 6-2, 6-2, 6-3 at Arthur Ashe Stadium in a rematch of July's Wimbledon final.

Djokovic is trying to become the first man to win all four major titles in the same year since Rod Laver in 1969.

Djokovic will play last match on Wednesday at US Open

The 34-year-old Serbian advanced to a Friday semi-final against Tokyo Olympic champion Alexander Zverev, who reached his fourth career Slam semi-final by eliminating South Africa's 46th-ranked Lloyd Harris 7-6 (8/6), 6-3, 6-4.

Zverev defeated Djokovic in the Olympic semi-finals but trails their overall rivalry 6-3.