Novak Djokovic has been visited twice by a doctor for a stomach issue and given what he called “miracle pills” during a 6-1, 6-7 (7), 6-2, 6-2 victory over Alexandre Muller in Wimbledon’s first round.

Novak Djokovic grateful for 'miracle pills' after overcoming stomach pain in round one win - The Serb started his push for an eighth title in SW19 on the back foot

Novak Djokovic overcame a mysterious stomach ailment to defeat Alexandre Muller 6-1, 6-7 (7-9), 6-2, 6-2 in his Wimbledon first-round match on Centre Court. The seven-time champion cruised through the opening set before experiencing what he described as going from feeling his "absolute best" to his "absolute worst" for approximately 45 minutes