Frustrated Novak Djokovic can't find rhythm in return from layoff, suffers BNP Paribas Open loss 0 12 Mar 2018 01:21 USATODAY (Tennis Top Stories) Novak Djokovic, the former world No. 1, made his 2018 BNP Paribas Open debut on Sunday and struggled in a loss. He returned after an elbow procedure in February.