WATCH | Australian Open: Ruthless Elina Svitolina gives masterclass to compatriot Kostyuk

Ruthless fourth seed Elina Svitolina gave 15-year-old compatriot Marta Kostyuk a 59-minute lesson in grand slam tennis to reach the fourth round of the Australia Open with a 6-2 6-2 victory in searing heat on Friday.

Qualifier Kostyuk became the youngest player to reach the third round of a grand slam in over 20 years on Wednesday but her dream run was brought to a shuddering halt by her fellow Ukrainian on Rod Laver Arena.

"She's a great fighter. She always fights until the end...She has a bright future."@ElinaSvitolina, humble in victory, praising 15-year-old countrywoman @marta_kostyuk #AusOpen pic.twitter.com/bDVZeL3j2z

— #AusOpen (@AustralianOpen) January 19, 2018

The teenager made an excellent start by breaking Svitolina in the first game of the match but from then on it was pretty much all one-way traffic as the in-form world number four set up a meeting with Czech qualifier Denisa Allertova.

Svitolina, showing no desire to spend a minute longer in the heat than necessary and no sign of the injury issues she reported after her second-round match, progressed when Kostyuk served up her ninth double fault of the contest.