Along Lleyton Hewitt in double for the last tournament of his career at the Australian Open, Sam Groth made a double fault to gave the break to their opponents, on what was probably the last serve of his career. His racquet didn't survived to that.
Here is the shot of the Day #4, selected by organizers at Roland-Garros. Huge defense from Rafael Nadal against Yannick Maden on the Court Suzanne Lenglen.
Great point from David Ferrer against Stan Wawrinka in London (ATP Finals 2015, Masters). First he defends superbly well and then makes the difference with a perfect small forehand.