Andy Murray was forced to retire from his second-round match at Queen’s Club with a back injury while trailing Jordan Thompson 4-1. The injury means it is unclear whether Murray will be physically ready to compete at Wimbledon for what would probably be a final time. Murray, a five-time champion at Queen’s Club, had started his tournament with a 6-3, 3-6, 6-3 victory against Alexei Popyrin on Tuesday, which marked his first ATP win since tearing ankle ligaments during a third‑round match at the Miami Open in March.