by Scott WILLIAMS MADRID , Spain (AFP) — Novak Djokovic stepped up his preparations for the French Open as the top seed beat teenager Borna Coric 6-2, 6-4 in his opening match at the Madrid Masters on Wednesday. The world number one, who lifted the trophy in the Spanish capital five years ago, has not played in Madrid since 2013 when he lost his opening match to Grigor Dimitrov. The Serb’s success over Croatian youngster […]