World number one Novak Djokovic has withdrawn from his doubles match at the Western & Southern Open in New York, citing neck pain.
The top-seeded Serb was due to face American duo Tommy Paul and Frances Tiafoe, alongside his doubles partner and Davis Cup team-mate Filip Krajinovic.
Djokovic, who is a perfect 18-0 so far this season, is scheduled to commence his singles campaign at the tournament – relocated from Cincinnati to New York this year due to the coronavirus pandemic – on Monday against Lithuanian qualifier Ricardas Berankis.
The alternate team of Nikola Cacic and Dusan Lajovic will replace Djokovic and Krajinovic in the doubles draw.