KEY BISCAYNE, Fla. — The way Roger Federer is playing tennis, it might seem as if it’s 2006.
That year, at age 24, Federer won the Australian Open and the first two Masters 1000-level tournaments in Indian Wells and Miami, known as the Sunshine double. By the end of that season, Federer was 92-5 with 12 tournament victories, including three Grand Slam titles.