In her first match since Wimbledon, Jovanovski took some time to make the transition from grass to hard, dropping the opening three games against World No.214 Nigina Abduraimova.
This early setback succeeded in rousing the Serb from her slumber, and she promptly reeled off the next six games to take the set. The second opened with four successive breaks of serve before Jovanovski belatedly took control, wrapping up a 63 63 win on her third match point after an hour and a half on court.
Elsewhere in the top half of the draw, Jovanovski's compatriot and prospective quarterfinal opponent, No.8 seed Vesna Dolonc was knocked out by Kristyna Pliskova, 61 62. Next up for Pliskova will be Polish qualifier Magda Linette, who defeated last year's runner-up, Julia Cohen, 62 63.
Joining them in the last 16 was Shahar Peer, after she prevailed in a bizarre encounter on Centre Court. Since the start of the year, Peer has won just six main draw matches, and she looked set for another early exit after falling a set and a break down to Ilona Kremen.
However, the former World No.11 persevered with her aggressive approach and was rewarded as her opponent's game rapidly began to unravel. In a dramatic turnaround Peer reeled off the final 12 games of the match to run out a 36 62 60 winner.