Novak Djokovic came from a set down to beat Alexandr Dolgopolov . The world No 1 remains in contention for his fifth Miami Open win . Dolgopolov became less mobile after receiving treatment to his feet . TL;DR Andy Murray through after beating South Africa 's Kevin Anderson .
Novak Djokovic came from a set down to beat Alexandr Dolgopolov . The world No 1 remains in contention for his fifth Miami Open win . Dolgopolov became less mobile after receiving treatment to his feet . Djokovic faces David Ferrer next after Spaniard beat Gilles Simon . Andy Murray through after beating South Africa 's Kevin Anderson .