In the first stage competition held in Milton Keynes, England, 31-year-old Xiao won the group decider against Iran's Hossein Vafaei 3-0.
Djokovic beat his fellow Serb Filip Krajinovic 7-6 (7), 6-3, while Nadal won 6-1, 6-3 against Dusan Lajovic, also of Serbia.
Fulham almost had the perfect start when an errant pass from Gabriel allowed Aboubakar Kamara through on goal, but Arsenal keeper Bernd Leno was able to scramble the ball to safety.
The 2019 edition of the FIVB Men's and Women's Volleyball Club World Championships were held by Brazil and China respectively, with Italian clubs Lube Civitanova and Imoco Volley claiming gold. Enditem
During the last two seasons in the Premier League, Jota scored 16 goals in 67 appearances as Wolves finished seventh in back-to-back campaigns.
Adrian Mierzejewski added the third in the 71st minute after collecting Marcelo Cirino's heel pass in close range, bringing three league wins in a row to Lifan.
"His inappropriate words are inconsistent with the social responsibilities and values abided by our club and have brought serious adverse social impacts to the club and the league. We will not sign him for the new season," said Fujian Sturgeons in a statement.
"He is one of our cornerstones and vital figures. Everyone in the club is fond of him," the Bayern official added.
Belgium's Ben Broeders finish second with a personal best of 5.80m and Ernest John Obiena of the Philippines also cleared 5.80m but had to finish third after a count-back. Enditem
Marco Cecchinato of Italy labored to beat Britain's Kyle Edmund 3-6, 7-6 (7), 6-2 and is set to meet Serbia's Filip Krajinovic.
According to Reuters, Diack was found guilty of accepting bribes from Russian athletes suspected of doping, to cover up test results and let them compete in major events including the 2012 London Olympics.