The conditions will be extremely testing, but Murray copes with heat and humidity better than most. Both were major factors in Cincinnati, but the British No 1 never wilted in a final that lasted two hours and 23 minutes and featured many lengthy rallies."I've been playing a lot of matches, but right now I feel fine both physically and mentally," Murray said. "The humidity this week was unbelievable. It was well over 100 degrees out on court yesterday. "I've played well in these conditions this week, but they're not conditions that you would want to play in all the time. It's tough after matches to make sure you're properly hydrated and eating the right sort of food. You can lose quite a lot of weight playing in those conditions.