![DALLAS, TX - JANUARY 29: Kei Nishikori (JPN) pumps his fist during the RBC Tennis Championships of Dallas on January 29, 2018 at the T Bar M Racquet Club in Dallas, Texas. ( DALLAS, TX - JANUARY 29: Kei Nishikori (JPN) pumps his fist during the RBC Tennis Championships of Dallas on January 29, 2018 at the T Bar M Racquet Club in Dallas, Texas. (](https://l450v.alamy.com/450v/2nxm9nk/dallas-tx-january-29-kei-nishikori-jpn-prepares-to-return-serve-during-the-rbc-tennis-championships-of-dallas-on-january-29-2018-at-the-t-bar-m-racquet-club-in-dallas-texas-photo-by-george-walkericon-sportswire-icon-sportswire-via-ap-images-2nxm9nk.jpg)
DALLAS, TX - JANUARY 29: Kei Nishikori (JPN) pumps his fist during the RBC Tennis Championships of Dallas on January 29, 2018 at the T Bar M Racquet Club in Dallas, Texas. (
![DALLAS, TX - JANUARY 29: Kei Nishikori (JPN) pumps his fist during the RBC Tennis Championships of Dallas on January 29, 2018 at the T Bar M Racquet Club in Dallas, Texas. ( DALLAS, TX - JANUARY 29: Kei Nishikori (JPN) pumps his fist during the RBC Tennis Championships of Dallas on January 29, 2018 at the T Bar M Racquet Club in Dallas, Texas. (](https://l450v.alamy.com/450v/2nxm9wd/dallas-tx-january-29-kei-nishikori-jpn-stretches-for-a-forehand-during-the-rbc-tennis-championships-of-dallas-on-january-29-2018-at-the-t-bar-m-racquet-club-in-dallas-texas-photo-by-george-walkericon-sportswire-icon-sportswire-via-ap-images-2nxm9wd.jpg)
DALLAS, TX - JANUARY 29: Kei Nishikori (JPN) pumps his fist during the RBC Tennis Championships of Dallas on January 29, 2018 at the T Bar M Racquet Club in Dallas, Texas. (
![Kei Nishikori rallies past Matthias Bachinger in second round of RBC Tennis Championships | The Japan Times Kei Nishikori rallies past Matthias Bachinger in second round of RBC Tennis Championships | The Japan Times](https://www.japantimes.co.jp/wp-content/uploads/2018/02/sp-tennis-a-20180202.jpg)