can try playing easy with robot/partner/returnboard only holding racket with thump and index finger. agree with point above that using core/body is important, perhaps focus on breathing too
serve fault controversy put a damper on an otherwise awesome match, good win for Tanaka. came right down to it. overall good behavior from Lebrun given the situation (faulted two serves in a row 5-5 in game 5, no TTR available).