Novak Djokovic looks to march into yet another Indian Wells final when he takes on John Isner on Saturday.
No American has won Indian Wells in over a decade and Isner is well aware of the scale of the task facing him when he plays Djokovic on Saturday.
"To beat that guy, you have to be on top of your game no matter who you are. The same goes for me," he said. "I'm going to have to obviously serve well and take my chances after that. So it's going be one of the toughest matches I'll ever play, because he's No. 1 in the world. But hopefully I'll come out on Saturday and put together a good match and take it to him as best I can."
Isner reached his second successive Masters semi-final with a gutsy 6-3, 1-6, 7-5 win over 13th seed Gilles Simon while Djokovic had an easier time of things, defeating Nicolas Almagro 6-3, 6-4 earlier in the day.
"I had a very powerful ball striker on the opposite side of the net," Djokovic said. "He's very solid from groundstrokes and has a powerful serve, but I knew that he's inconsistent with that, so I just needed to hang in there, which I did. It's definitely satisfying to play well. This is something that we all want to do, and we all practice very hard each day in order to play as best as we can in the official matches."
Djokovic has won both his previous matches with Isner but he got a real taste of the American's ferocious serve in the Davis Cup two years ago, needing five sets to win even though it was on clay.
Prediction: Djokovic in two.