Premise: Novak Djokovic ( Новак Ђоковић , Novak Đoković , [ nôʋaːk d͡ʑôːkoʋit͡ɕ ] ; born 22 May 1987 ) , often referred to by the hypocorism Nole , is a Serbian professional tennis player who is currently ranked world No. 2 in men 's singles tennis by the Association of Tennis Professionals ( ATP ) .
Hypothesis: Novak Djokovic's birth month is May.
Label: ENTAILMENT