Tomas Berdych, who is playing his first tournament with new coach Goran Ivanisevic, says he is excited to have the Croat courtside.
The two agreed to start working together a couple of weeks ago, with Ivanisevic joining Berdych at this week's event in Cincinnati.
The 2010 Wimbledon finalist is still chasing a Grand Slam title, and he wanted a coach who could help him get to the next level.
"I think that's the guy I was looking for," Berdych told reporters in Cincinnati.
The world No. 8 pointed to Ivanisevic's Grand Slam victory at age 29, in addition to his experience coaching Marin Cilic to a major title.
"It's exciting times for me," said Berdych. "I'm looking forward to having work done with him on the team."