Matosevic defeated top players including Milos Raonic, Marin Čilić, Nikolay Davydenko, Jo-Wilfried Tsonga and John Isner.

During his childhood, Matosevic's parents, Branko and Ljubica, moved the family to Melbourne, Australia and he now competes for his adopted country.

While growing up he played soccer along with tennis and is a fan of cricketer Shane Warne as well as following the Sydney Swans in the Australian Football League.

In January 2010, he played his first Grand Slam match in Melbourne at the Australian Open and lost in the first round.

After an unsuccessful start to the 2012 season (which included four consecutive losses in home tournaments) Matosevic entered the 2012 Caloundra International as the No.

Matosevic continued his form when he entered the 2012 Delray Beach International Tennis Championships and qualified for the main draw.

In the semifinal Matosevic played Israeli Dudi Sela where he defeated him to reach his first ever ATP final, where ultimately he lost to South African Kevin Anderson in straight sets.

At the Monte Carlo Masters, Matosevic earned one of the biggest victories of his career, defeating former top ten player Fernando Verdasco in the first round.

Matosevic's season began at the Brisbane International where he defeated Julien Benneteau and Sam Querrey.

He reach the quarterfinals of the 2014 Apia International Sydney defeating Florian Mayer and Andreas Seppi on the route but lost to Sergiy Stakhovsky.

At the French Open, he reached the second round of a Grand Slam tournament for the first time in his thirteenth attempt, defeating Dustin Brown in four sets.

Matosevic won his second grand slam match by defeating the Spaniard Fernando Verdasco in four sets in the first round of Wimbledon.

After gaining a wild card into Brisbane ATP tournament Matosevic lost first round to American Steve Johnson.

[13] Following his first round exit from the Brisbane ATP tournament Marinko was invited to fill in for Matthew Ebden at the Hopman Cup in Perth.

His next tournament was at Delray Beach where he caused an upset over World number 20 and second seed John Isner in the first round.

After Delray Beach, he played in Acapulco where he defeated Marcel Granollers before losing to eventual champion David Ferrer.

Following this was a string of first round losses at Indian Wells, Irving, Miami, Houston, Barcelona, Estoril, Geneva, French Open and Rosmalen.

In August and September, Matosevic has his best singles results reaching the semi-finals of Bangkok and Nanchang challengers before ending the season in October.

In October, Matosevic reached the semi-final of OEC Kaohsiung as a lucky loser, before playing further Asian challenger events until November.