Coach Ivan Lendl stated that great champions like Rafael Nadal and Andy Murray can never be underestimated as they all share one thing in common: incredible determination. Nadal, 35, admitted that his foot problem got so bad that there was a period when he wasn’t even sure he could play in Australia.In the end, Nadal made the decision to travel to Australia and the rest is history. In Australia, Nadal went 11-0 by winning back-to-back titles at the Melbourne Summer Set and the Australian Open. Lendl, who was recently reunited with Murray, was asked if Murray would be able to compete for major titles again.”You ask with a face of circumstances after what Rafa [Nadal] has done in Australia,” Lendl said, according to Eurosport. “All these guys have incredible determination. They’re like bulldogs and t …