Italian tennis player Flavio Cobolli lost a point at the United Cup when a second ball fell from his pocket during a rally against Stan Wawrinka. Cobolli stopped play, expecting a let, but the umpire awarded the point to Wawrinka. Tour supervisor Gerry Armstrong explained that Cobolli hindered himself by stopping the rally, as per the rules. Despite the controversy and debate, Cobolli went on to win the first set.