Tennis star Frances Tiafoe is known for pranking his colleagues, and this time it was former World No.1 Andy Murray fell victim to the American's sense of humor.

During an interview at the DC Open, Murray seemed focused as he answered some questions. However, the Brit failed to notice Tiafoe walk up behind him and linger over his shoulder while staring at him for a prolonged period of time.

Despite being almost face to face with the American, Murray was unable to detect Tiafoe's presence for almost half a minute. Tiafoe eventually spoke up, startling the three-time Grand Slam champion, who proceeded to admit he had no idea what was going on behind him. Murray even went as far as asking the interviewer how long Tiafoe had been standing behind him.