Marta Kostyuk took an enormous step towards fulfilling her potential as the Ukrainian closed out an incredible week by winning the biggest title of her career at the Madrid Open, defeating Mirra Andreeva of Russia 6-3, 7-5.

Although Kostyuk’s run through a WTA 1000 draw was unexpected, this title did not come out of nowhere. Kostyuk won her second career WTA event in Rouen just before Madrid, and has now put together an 11-match winning streak.

Kostyuk will break into the world top 15 for the first time, rising to a career high ranking of No 15.

This result has been a long time coming for Kostyuk. Now 23, she broke through as a 15-year-old in 2018, reaching the third round of the Australian Open as a qualifier. She is one of the best athletes on the tour, blessed with a varied and well-rounded game.

Many believed the Ukrainian would quickly rise up the rankings as a teenager but for so long she did not possess the emotional maturity and court sense to convert her potential into sustained success.

Her triumph in Rouen, a small WTA 250 event, seems to have changed everything. Kostyuk extended her winning streak with some excellent tennis over the past two weeks, including a rapid straight-sets win over the No 5 Jessica Pegula in round three. She arrived in the final ready for the challenge of facing Andreeva and managing her own emotions.

Kostyuk burst into the match relentlessly attacking with her forehand, dictating the majority of points and soaking up Andreeva’s first strike with her resourceful defensive skills. Her baseline dominance quickly yielded a 6-3, 1-0 lead with an early break in set two.

Still, success has rarely ever been straightforward for Kostyuk, who has been prone to losing her composure. Her predictable nervous wobble arrived and she lost three games in a row, dumping an easy overhead smash into the bottom of the net to hand over the break to Andreeva. She then faced two set points on her serve at 4-5.

In past years, either of those scenarios could have turned into a full-blown crisis. This time, the improved version of Kostyuk composed herself, re-established herself on top of the baseline and courageously closed out a victory that may prove a launchpad for continued success.