The retractable roof atop Ashe was shut .
The break of about 20 minutes gave Nishikori 's coach , 1989 French Open champion Michael Chang , a chance to get down to the locker room and consult with his player .
The retractable roof atop Ashe was shut , and the break of about 20 minutes gave Nishikori 's coach , 1989 French Open champion Michael Chang , a chance to get down to the locker room and consult with his player .