Alexander Zverev celebrates winning the Nitto ATP Finals crown with his team, including Ivan Lendl, and his parents, Alexander Sr. and Irina.

Marcelo Melo and Lukasz Kubot celebrate capturing the Rolex Shanghai Masters doubles title on Sunday after victory over Jamie Murray and Bruno Soares.

Marcelo Melo and Lukasz Kubot beat Oliver Marach and Mate Pavic in straight sets at the Rolex Shanghai Masters on Saturday.

Lukasz Kubot and Marcelo Melo celebrate reaching the Shanghai semi-finals on Friday.

Marcelo Melo and Lukasz Kubot defeat Oliver Marach and Mate Pavic in straight sets at the China Open on Sunday.

Second seeds Lukas Kubot and Marcelo Melo save three match points on Thursday against Rohan Bopanna and Edouard Roger-Vasselin in Beijing.

Marcelo Melo and Alexander Zverev visit Ditan Park for a Tai Chi lesson ahead of the China Open.

Lukasz Kubot and Marcelo Melo will look to finish the 2018 season at the Nitto ATP Finals in London for the second consecutive year.

Lukasz Kubot (front) and Marcelo Melo see off Roland-Garros champions Pierre-Hugues Herbert and Nicolas Mahut to reach the US Open quarter-finals.

Lukasz Kubot and Marcelo Melo break three times to defeat Raven Klaasen and Michael Venus in Cincinnati on Thursday.

Alexander Zverev, far right, who, with brother Mischa Zverev, lost in the Halle doubles final on Sunday, has some fun with champions Marcelo Melo, second from the right, and Lukasz Kubot.

Lukasz Kubot and Marcelo Melo defeat home favourites Alexander Zverev and Mischa Zverev in straight sets to win their second Gerry Weber Open title on Sunday.

Top seeds Lukasz Kubot, front, and Marcelo Melo advanced to the second round at Roland Garros by defeating Marton Fucsovics and Marco Cecchinato in straight sets on Wednesday.

Lukasz Kubot and Marcelo Melo take part in a cooking challenge during the Abierto Mexicano Telcel in Acapulco.

Marcelo Melo, Marin Cilic, Fabio Fognini and Lucaz Kubot march during a parade procession in Rio de Janeiro.

Marcelo Melo, left, and Lukasz Kubot participate in a Carnival parade ahead of the Rio Open.

World No. 1 duo Marcelo Melo and Lukasz Kubot looks to secure a second ATP World Tour title of 2018 at the ABN AMRO World Tennis Tournament in Rotterdam.

Lukasz Kubot and Marcelo Melo reach the quarter-finals after a three-set win over Rajeev Ram and Divij Sharan at the Australian Open on Monday.

Lukasz Kubot, front, and Marcelo Melo are looking to secure their second Grand Slam title as a team this fortnight.

Marcelo Melo and Lukasz Kubot celebrate their ninth ATP World Tour doubles title as a team at the Sydney International.

Bruno Soares and Jamie Murray earn their spot in the semi-finals at the season finale with a victory over top seeds Lukasz Kubot and Marcelo Melo.

Marcelo Melo stops to take a selfie with fans at the Nitto ATP Finals in London on Wednesday.

Marcelo Melo and Lukasz Kubot clinch the year-end No. 1 Emirates ATP Doubles Team Ranking after winning their opening match at the Nitto ATP Finals.

Marcelo Melo and Lukasz Kubot will look to win their first Nitto ATP Finals title this week.

The world’s top eight doubles teams attend the 2017 Nitto ATP Finals Official Launch, presented by Moët & Chandon, at the Tower of London.