Kokkinakis went past Gulbis by 3-2 after five astonishing sets which lasted four hours and seven minutes.

His win shocked many as Kokkinakis sits at the number 147 in the rankings while Gulbis is ranked 13th.

Kokkinakis will face his compatriot Sam Groth in the second round of the tournament.

Kokkinakis stuns Gulbis and goes through