Sander Gille/Joran Vliegen (R) of Belgium compete during the men's doubles final match between Sander Gille/Joran Vliegen of Belgium and Matwe Middelkoop of the Netherlands/Marcelo Demoliner of Brazil at ATP Zhuhai Championships in Zhuhai, south China's Guangdong Province, Sept. 29, 2019. (Photos: Xinhua)

Matwe Middelkoop (R) of the Netherlands/Marcelo Demoliner of Brazil compete during the men's doubles final match between Sander Gille/Joran Vliegen of Belgium and Matwe Middelkoop of the Netherlands/Marcelo Demoliner of Brazil at ATP Zhuhai Championships in Zhuhai, south China's Guangdong Province, Sept. 29, 2019.

Matwe Middelkoop (R) of the Netherlands/Marcelo Demoliner of Brazil pose on the podium after the men's doubles final match between Sander Gille/Joran Vliegen of Belgium and Matwe Middelkoop of the Netherlands/Marcelo Demoliner of Brazil at ATP Zhuhai Championships in Zhuhai, south China's Guangdong Province, Sept. 29, 2019.

Sander Gille/Joran Vliegen (R) of Belgium react during the men's doubles final match between Sander Gille/Joran Vliegen of Belgium and Matwe Middelkoop of the Netherlands/Marcelo Demoliner of Brazil at ATP Zhuhai Championships in Zhuhai, south China's Guangdong Province, Sept. 29, 2019.

Sander Gille/Joran Vliegen (R) of Belgium celebrate during the men's doubles final match between Sander Gille/Joran Vliegen of Belgium and Matwe Middelkoop of the Netherlands/Marcelo Demoliner of Brazil at ATP Zhuhai Championships in Zhuhai, south China's Guangdong Province, Sept. 29, 2019.

Sander Gille (2nd L)/Joran Vliegen (1st L) of Belgium and Matwe Middelkoop (1st R) of the Netherlands/Marcelo Demoliner of Brazil pose on the podium after the men's doubles final match between Sander Gille/Joran Vliegen of Belgium and Matwe Middelkoop of the Netherlands/Marcelo Demoliner of Brazil at ATP Zhuhai Championships in Zhuhai, south China's Guangdong Province, Sept. 29, 2019.

Matwe Middelkoop (R) of the Netherlands/Marcelo Demoliner of Brazil celebrate during the men's doubles final match between Sander Gille/Joran Vliegen of Belgium and Matwe Middelkoop of the Netherlands/Marcelo Demoliner of Brazil at ATP Zhuhai Championships in Zhuhai, south China's Guangdong Province, Sept. 29, 2019.

Sander Gille/Joran Vliegen (R) of Belgium compete during the men's doubles final match between Sander Gille/Joran Vliegen of Belgium and Matwe Middelkoop of the Netherlands/Marcelo Demoliner of Brazil at ATP Zhuhai Championships in Zhuhai, south China's Guangdong Province, Sept. 29, 2019.

Sander Gille/Joran Vliegen (L) of Belgium pose with the trophy after the men's doubles final match between Sander Gille/Joran Vliegen of Belgium and Matwe Middelkoop of the Netherlands/Marcelo Demoliner of Brazil at ATP Zhuhai Championships in Zhuhai, south China's Guangdong Province, Sept. 29, 2019.

Sander Gille/Joran Vliegen (L) of Belgium pose with the trophy after the men's doubles final match between Sander Gille/Joran Vliegen of Belgium and Matwe Middelkoop of the Netherlands/Marcelo Demoliner of Brazil at ATP Zhuhai Championships in Zhuhai, south China's Guangdong Province, Sept. 29, 2019.

Sander Gille/Joran Vliegen (R) of Belgium celebrate after the men's doubles final match between Sander Gille/Joran Vliegen of Belgium and Matwe Middelkoop of the Netherlands/Marcelo Demoliner of Brazil at ATP Zhuhai Championships in Zhuhai, south China's Guangdong Province, Sept. 29, 2019.

Matwe Middelkoop (L) of the Netherlands/Marcelo Demoliner of Brazil communicate with each other during the men's doubles final match between Sander Gille/Joran Vliegen of Belgium and Matwe Middelkoop of the Netherlands/Marcelo Demoliner of Brazil at ATP Zhuhai Championships in Zhuhai, south China's Guangdong Province, Sept. 29, 2019.

Sander Gille/Joran Vliegen (L) of Belgium pose with the trophy after the men's doubles final match between Sander Gille/Joran Vliegen of Belgium and Matwe Middelkoop of the Netherlands/Marcelo Demoliner of Brazil at ATP Zhuhai Championships in Zhuhai, south China's Guangdong Province, Sept. 29, 2019.