Novak Djokovic is through to the semi-finals of the Miami Open. The world number one eased past Tomas Berdych 6-3, 6-3 this morning. He says he feels in good form…Meanwhile, David Goffin secured his place in the last-four by defeating Gilles Simon in their quarter-final tie. The Belgian star came from a set down, to win 3-6, 6-2, 6-1. Goffin says he feels he’s improving all the time…