World No. 1 Novak Djokovic battled through neck pain on the way to a 7-6 (7/2), 6-4 victory over Ricardas Berankis at the Western & Southern Open, where second seed Dominic Thiem crashed out.

Djokovic, who pulled out of doubles with a sore neck on Sunday, made it through to the Round of 16 despite the ailment, for which he received treatment on court. "It's getting better," he said after the 7-6 (7/2), 6-4 win. "It's been four days. It's not yet where I'd like it to be but it's heading in the right direction."