Basilashvili survives early scare in Shanghai, Verdasco knocked out
Nikoloz Basilashvili avoided becoming an early casualty at the Shanghai Masters when the Georgian 15th seed was forced to fight back from a set down to beat Moldova's unseeded Radu Albot 4-6 6-1 6-3 and move into the second round.
Basilashvili, who was the only seeded player in action on the opening day, dropped serve once in the first set before finding his feet and converting four of eight break points.
Taylor Fritz was pushed the distance by Spain's Fernando Verdasco, with the American coming out on top in two hours and 40 minutes with a 7-6(2) 6-7(5) 6-4 victory.
Fritz looked set to win the match in the second set before the 35-year-old Spaniard fought back in the tiebreak to take it into a decider where he eventually ran out of steam.
Portuguese Joao Sousa was also involved in a three-setter, dropping the first set before beating Serbia's Filip Krajinovic 2-6 6-4 7-6(5).
Local favourite Zhizhen Zhang was knocked out in straight sets by Poland's Hubert Hurkacz who prevailed 7-6(5) 6-4.
Djokovic and Thiem were in action in different tournaments on Sunday, winning the Japan Open and China Open respectively.
Former world number one Andy Murray, who was awarded a wildcard last month, plays Argentina's Juan Ignacio Londero on Monday while Rafa Nadal has skipped the tournament with a wrist injury that also cut short his Laver Cup campaign last month.