Andy did very well at the Australian Open in 2013, he skipped the clay and triumphed at Wimbledon. The hard court season was disappointing and his exit at Flushing Meadows was a bit of a shock. I reckon they thought long and hard about the timing of the operation and it must be calculated to give Murray the maximum chance of preparing to mount a challenge for the Australian Open next year. I think 2 Slam wins (AO & Wimbledon) are a realistic yield for him. What is he going to achieve? Will he be so fresh he'll win three Slams?