movdqa
Talk Tennis Guru
Berdych had this problem back in 2012 when he had the new Instinct PJ around Wimbledon but used the YT PJ and then went back and forth for the rest of the year finally settling down to the Instinct at the end of the year. But he eventually got over it.
Del Potro only has two by choice. He could switch and adjust just as Federer is doing now and just like lots of other pros have already done.
Del Potro only has two by choice. He could switch and adjust just as Federer is doing now and just like lots of other pros have already done.