Ivanisevic, who said he has no symptoms, attended the Adria Tour exhibition series, a charity event hosted by Djokovic in Belgrade and at the Adriatic resort of Zadar in Croatia.
Ivanisevic helps coach Novak Djokovic, while Martinez works with Garbine Muguruza.
Novak Djokovic says, "I'm really grateful for the career I’ve had, but for me right now, tennis is more a platform than an obsession about individual achievement."
The fan vote results will be announced in late September. The overall results and the complete Tennis Hall of Fame Class of 2020 will be announced in January. The 2020 Induction Ceremony will be hosted on 18 July, 2020 in Newport, Richmond.
Wimbledon 2019: Former winner Goran Ivanisevic joins defending champion Novak Djokovic's coaching staff
The 32-year-old Serbian Novak Djokovic opens with Philipp Kohlschreiber whose best run at Wimbledon came in 2012 when he made the quarter-finals
Roger Federer's 100th title: Victory against Stefanos Tsitsipas perfectly sums up Swiss maestro's decades of excellence
Showing no signs of the nervous nineties, Roger Federer raced past Stefanos Tsitsipas 6-4, 6-4 in an hour and 10 minutes to claim his 100th career title
Australian Open 2019: Fitter Milos Raonic’s serve stood him in good stead against a lost Alexander Zverev in fourth round
Raonic has won a staggering 90.9 percent of his service games – the third-highest of all time, and is tied with Andy Roddick for the fifth-quickest recorded serve recorded so far.
Australian Open 2018, stats preview: A look at the numbers behind Roger Federer and Marin Cilic's title clash
Roger Federer and Marin Cilic's meeting in the Australian Open final will be a replay of their encounter in the finals at Wimbledon 2017.
Australian Open 2018: Kyle Edmund’s improved tenacity could help him kill another giant in Marin Cilic
Edmund’s improved physical and mental tenacity in Melbourne, especially during his five-set win over Nikoloz Basilashvili in near 40 degree Celsius heat, has earned him a glowing report in every experts’ book.
Australian Open 2018: Marin Cilic defeats Pablo Carreno Busta for 100th Grand Slam victory, reaches quarters
Marin Cilic became the first man into the quarter-finals of the Australian Open when he ground down Pablo Carreno Busta 6-7(2), 6-3 7-6(0), 7-6(3) on Sunday.
The seventh-seeded Cilic, who was US Open champion in 2014, will face either seven-time Wimbledon winner Roger Federer or Tomas Berdych in Sunday's final.
Cilic was born in Medjugorje, Bosnia but represents Croatia after moving to the neighbouring country as a teenager to further his career.
Wimbledon 2017: Marin Cilic beats Gilles Muller to end long wait for first All England Club semi-final
Marin Cilic had lost in the quarter-finals on his last three visits to Wimbledon but he finally made it to the last four at the expense of the man who stunned Rafael Nadal in the last 16.
World No 1 Andy Murray will carry the lesson of last year's US Open quarter-final defeat to Kei Nishikori into Wednesday's French Open last eight clash against the Japanese.
Berdych, the Czech world number 14, only teamed up with Ivanisevic in August 2016.
Yuki Bhambri may have been a top 100 player, Ramkumar Ramanathan may have the best serve on the team, but it was Leander Paes that the people sat in the aisles for.
Roger Federer and Rafael Nadal will play their ninth Grand Slam final at the Australian Open on Sunday. Take a glance at how the eight previous finals unfolded.
Terming the surprise loss against little known Jozef Kovalik as "small stumble", Marin Cilic says he is ready to challenge the 'Big Four' in the 2017 season since he has taken a "huge step forward" with new coach Jonas Bjorkman on the motivational front.
Marin Cilic has split with coach Goran Ivanisevic after three years, the world number 12 has said.
Marcus Willis' tussle with Roger Federer did not work up too much froth, but the match served to remind us that sport is still isn’t always just about the winning score.