Why a tennis player had to ask for their phone at 1 a.m. in the middle of a grueling match‎

Welcome back to the Monday Tennis Briefing, where The Athletic will explain the stories behind the stories from the past week on court. This week, an unexpected phone alarm after midnight revealed what players have to do for anti-doping, the WTA Tour and ATP Tour Finals races went in opposite directions and a doubles legend showed off her multi-format brilliance. If you’d like to follow our fantastic tennis coverage, click here. Why was a player’s phone going off during a 1 a.m. match? At 1 a.m.