I’m going to have to veto Nick on this one: “I used lead tape when I was younger to get more racquet head speed.” Hmmm. My guess is he had his sticks matched with lead as a junior, probably close to stock swingweight. Now the custom sticks yonex makes him are probably zero tolerance or close to it so no need for lead. I assume generally there are provisions in pro endorsement contracts that limit to what extent they can share the true nature of their equipment. Either that or they simply just don’t care and focus instead on their play and match prep.