KEY BISCAYNE, FL - APRIL 02: Simona Halep of Romania talks to the umpire during the change over against Serena Williams of the United States in their semi final match during the Miami Open Presented by Itau at Crandon Park Tennis Center on April 2, 2015 in Key Biscayne, Florida. Clive Brunskill,Image: 236281309, License: Rights-managed, Restrictions: , Model Release: no, Credit line: Profimedia