Roger Federer will play Andy Murray in the semi-finals of the Australian Open after the second seed battled his way to a 7-6 (7-4) 4-6 7-6 (7-4) 3-6 6-3 win over Jo-Wilfried Tsonga.Roger Federer will play Andy Murray in the semi-finals of the Australian Open after the second seed battled his way to a 7-6 (7-4) 4-6 7-6 (7-4) 3-6 6-3 win over Jo-Wilfried Tsonga.