Licja Rosolska (R) of Poland and Nikola Mektic of Croatia compete during the mixed doubles final match against Bethanie Mattek-Sands of the United States and Jamie Murray of Britain at the 2018 US Open tennis tournament in New York, the United States, Sept. 9, 2018. Mattek-Sands/Murray won 2-1 and claimed the title. (Xinhua/Wang Ying)

Bethanie Mattek-Sands (R) of the United States and Jamie Murray of Britain celebrate after winning the mixed doubles final match against Alicja Rosolska of Poland and Nikola Mektic of Croatia at the 2018 US Open tennis tournament in New York, the United States, Sept. 9, 2018. Mattek-Sands/Murray won 2-1 and claimed the title. (Xinhua/Wang Ying)

Bethanie Mattek-Sands (1st R) of the United States and Jamie Murray (2nd R) of Britain, Licja Rosolska (2nd L) of Poland and Nikola Mektic of Croatia pose during the awarding ceremony after the mixed doubles final match at the 2018 US Open tennis tournament in New York, the United States, Sept. 9, 2018. Mattek-Sands/Murray won 2-1 and claimed the title. (Xinhua/Wang Ying)

Bethanie Mattek-Sands (Front) of the United States and Jamie Murray of Britain compete during the mixed doubles final match against Alicja Rosolska of Poland and Nikola Mektic of Croatia at the 2018 US Open tennis tournament in New York, the United States, Sept. 9, 2018. Mattek-Sands/Murray won 2-1 and claimed the title. (Xinhua/Wang Ying)

Bethanie Mattek-Sands (R) of the United States and Jamie Murray of Britain hold up the trophy during the awarding ceremony after winning the mixed doubles final match against Alicja Rosolska of Poland and Nikola Mektic of Croatia at the 2018 US Open tennis tournament in New York, the United States, Sept. 9, 2018. Mattek-Sands/Murray won 2-1 and claimed the title. (Xinhua/Wang Ying)

Bethanie Mattek-Sands (L) of the United States and Jamie Murray of Britain celebrate after winning the mixed doubles final match against Alicja Rosolska of Poland and Nikola Mektic of Croatia at the 2018 US Open tennis tournament in New York, the United States, Sept. 9, 2018. Mattek-Sands/Murray won 2-1 and claimed the title. (Xinhua/Wang Ying)

Licja Rosolska (L) of Poland and Nikola Mektic of Croatia compete during the mixed doubles final match against Bethanie Mattek-Sands of the United States and Jamie Murray of Britain at the 2018 US Open tennis tournament in New York, the United States, Sept. 9, 2018. Mattek-Sands/Murray won 2-1 and claimed the title. (Xinhua/Wang Ying)

Bethanie Mattek-Sands (R) of the United States and Jamie Murray of Britain hold up the trophy during the awarding ceremony after winning the mixed doubles final match against Alicja Rosolska of Poland and Nikola Mektic of Croatia at the 2018 US Open tennis tournament in New York, the United States, Sept. 9, 2018. Mattek-Sands/Murray won 2-1 and claimed the title. (Xinhua/Wang Ying)

Licja Rosolska (R) of Poland and Nikola Mektic of Croatia hold up the trophy during the awarding ceremony after the mixed doubles final match against Bethanie Mattek-Sands of the United States and Jamie Murray of Britain at the 2018 US Open tennis tournament in New York, the United States, Sept. 9, 2018. Mattek-Sands/Murray won 2-1 and claimed the title. (Xinhua/Wang Ying)

Bethanie Mattek-Sands (R) of the United States and Jamie Murray of Britain celebrate after winning the mixed doubles final match against Alicja Rosolska of Poland and Nikola Mektic of Croatia at the 2018 US Open tennis tournament in New York, the United States, Sept. 9, 2018. Mattek-Sands/Murray won 2-1 and claimed the title. (Xinhua/Wang Ying)