Alexander Zverev has coped with the pressure of a Grand Slam final and not even an earthquake could jangle the nerves of the German youngster during his Mexican Open semi-final against Dominik Koepfer on Friday. The 5.7 magnitude quake with an epicentre around 60 kms southeast of San Marcos, a two-hour drive from Acapulco, sent tremors through the stadium for about 30 seconds with Koepfer serving in the opening game of the second set. “I didn’t know what happened. Neither did Dominik,” said