Swiss second seed Roger Federer was pushed out to five sets before subduing Jo-Wilfried Tsonga to reach the semifinals at the Australian Open on Wednesday. Federer defeated the French seventh seed, 7-6 (7/4), 4-6, 7-6 (7/4), 3-6, 6-3 in 3hr 34min on Rod Laver Arena and will meet Andy Murray in Friday's semi. MURRAY STROLLS INTO LAST FOUR Andy Murray produced his best performance of the tournament against Jeremy Chardy to reach the semifinals for the fourth consecutive year. The British third seed was too strong for the unseeded Frenchman winning 6-4, 6-1, 6-2 in