It was a day full of upsets in both Doha and Dubai, with experienced players proving they can still beat the best and rising stars defeating childhood idols.
These are the Top 5 Photos from Tuesday. (All photos Getty)
The 20-time Grand Slam champion was spotted taking in Dan Evans' first-round clash against Jeremy Chardy.
The Swiss Star will be making his return to the ATP Tour at Doha's 250-level event. It's been nearly 14 months since the 39-year-old competed in a tour-level match and he will be tested against Evans. In all three previous bouts, Federer has never given up a single set to the Brit, but with no match play under his belt, it could be a different story on Wednesday.