Cash has come on board to advise the young fast-rising Californian, who works full time with Treyz.
"I suppose a consultant at this stage," Cash said. "We were supposed to be in California, but he ended up getting the wild card here."
That wild card has worked out pretty well. What's it like having a Wimbledon champion helping you out?
“He’s had some good advice, especially against these opponents.” Nakashima said. “Just really happy that he’s here and thankful that he's here.”
Cash worked with Alexei Popyrin for as stretch last year, and before that he spent a few seasons with Coco Vandeweghe, but he's entirely new to Nakashima.
“Actually I just met him here a couple days ago,” Nakashima said. "We were supposed to have a training week out in California. We've been talking back and forth the last couple of weeks.”