Competing in a Grand Slam is an achievement for any tennis player, especially those who are still cutting their teeth on the big stage.Borna Coric may be only 21-years-old, yet he has played in the main draw at no less than eight majors, reaching round three of the 2015 French Open in his best showing to date.That’s some effort for a youngster who turned professional just over four years ago in 2018.With seven wins against top ten players already under his belt, Coric is widely expected to continue troubling the best in the world throughout 2018.The Croatian was handed a relatively comfortable draw at this year’s Australian Open in World No. 122, John Millman.Ranked 76 places higher than his first-round opponent, few would’ve been surprised if the immensely talented Coric had made light work of the Australian.With the crowd offering almost unanimous support to Millman, it quickly became obvious Coric wouldn’t be strolling into the last 64, though.The one-time ATP title winner dropped the first set 7-5, although he could be forgiven for thinking momentum would eventually swing his way in the second.However, down a break point with the score at 1-2, Coric allowed his frustration to get the better of him as Millman won a brilliant rally to tighten his grip on the match.Losing a service game to an opponent with virtually every spectator in the arena behind him is bad enough, but when the deciding point happens to end in humiliating fashion, it must be agony.Unfortunately for Coric, that’s exactly what happened – and he produced a fitting reaction, too.

CORIC GOES CRAZY

After appearing to have taken control of the point with a clever serve and volley routine, the youngster was caught out at the net by a sublime two-handed lob from Millman.

Coric turned to give chase only to see the ball land just inside the baseline, and as fans roared in appreciation, his reaction was in total contrast to the Australian crowd.

He began smashing his racket on the court surface, and with four huge swings, left it a mangled mess before tossing it towards his seat.

Such is the luxury of being a professional tennis player, Coric casually pulled a replacement from his bag as he changed ends.

The new racket did little to help his cause, though, and the matched slipped away to end 7-6, 6-4, 6-1 to Millman.

Coric may well be a future Grand Slam winner, but he clearly needs to get a handle on his temper first.