"The conditions are not easy. It's quite slow. The roof, obviously it helps a lot. especially in the next week, you never know if it's raining or not," said the Sinner.
The 24-year-old Sherif, who ranks 172 in the world, was the first Egyptian woman to appear in a Grand Slam main draw, while Pliskova, 27, is bidding for her first major title in her 33rd Grand Slam appearance.
With the victory over Ymer, Djokovic improved his record this season to a stellar 32-1. The only defeat came in a disqualification earlier this month at the US Open, where he hit a ball in frustration which struck the line judge on the neck.
The players, all aged between 12 and 15, were returning to the town of Offinso having undergone a local district football registration exercise when their driver lost control of the minibus and crashed into a river.
The game was played behind closed doors at the Menorah Mivtachim Arena in the coastal city of Tel Aviv.
Tianjin coach Liu Hao admitted as a young team, his side have a gap to Shanghai in terms of skill.
If Villarreal coach Unai Emery was unhappy at the space his side left Barca in the opening goal, he will have been furious as Fati doubled his tally just four minutes later.
Tianjin Teda had a goalless draw with Wuhan Zall, and finished the last in Suzhou division without a single win in 14 rounds. Wuhan Zall ranked fifth with 17 points.
Greece's fifth seed Stefanos Tsitsipas had to dig deep to outlast Jaume Munar 4-6, 2-6, 6-1, 6-4, 6-4 after three hours and 12 minutes to advance, while Andrey Rublev of Russia also recovered from two sets down to dispatch American Sam Querrey 6-7(5), 6-7(4), 7-5, 6-4, 6-3 to claim the first-round win. Enditem
Earlier in the day Suarez scored twice and provided an assist on his Atletico Madrid debut, just four days after arriving from Barcelona as Atletico began their campaign with an impressive 6-1 victory at home to Granada.
Inter were three goals up in the 28th minute as Lukaku bagged his second after Roberto Gagliardini had smashed in a volley.