20-time Grand Slam champion Novak Djokovic has congratulated Daniil Medvedev on becoming the No. 1. Medvedev entered this week with a strong chance to become No. 1 for the first time in his career. Medvedev was guaranteed to become the No.1 with an Acapulco victory. On Thursday, Djokovic suffered a shock quarterfinal defeat in Dubai against qualifier Jiri Vesely. With the Djokovic defeat, Medvedev – who has reached the Acapulco quarterfinal – is guaranteed to become the new No.1. “Congratulations also to a very deserving @DaniilMedwed, who will now become world number 1,” Djokovic wrote on Twitter. Djokovic delivers on his promise During his pre-tournament press conference in Dubai, Djokovic was asked about the prospect of Medvedev replac …