The midfielder is part of the Manchester City squad that has traveled to Saudi Arabia in the hope of capping off a glorious year by being crowned the top club side in world football.
Pep Guardiola's side qualified for the competition by winning the Champions League last season.
But while Kovacic wasn't part of the treble-winning Man City side, he's certainly earned his spot at the competition.
The Serbia international was part of the Real Madrid side who won the Club World Cup in 2016, before then being part of the side who retained the crown the following year in 2017.
His time at the Santiago Bernabeu saw him win the Champions League no less than three times, something he subsequently won with Chelsea.
READ MORE ON MAN CITY
Souness makes Champions League prediction after raising questions about European leagues
Arsenal get Porto and Man City land Copenhagen as Champions League last-16 draw revealed
Joining the Blues in 2019, Kovacic won the Champions League - beating City in the 2021 final - and the Club World Cup.
In the summer of 2023, he joined Man City and won his first trophy - the Super Cup almost immediately - with the Club World Cup giving him the chance to win his second trophy of his fledgling City career.
Still only 29, if Kovacic does win the Club World Cup with a third different club, it would see him surpass a number of football greats.
Stars such as Cristiano Ronaldo [Manchester United and Real Madrid], Toni Kroos [Bayern and Real Madrid], David Alaba {Bayern Munich and Real Madrid] and Antonio Rudiger [Chelsea and Real Madrid] are all among the players to win it with two different teams.
Most read in Football
Man United fans vent fury at Glazers for what they did after Tampa Bay Buccaneers' NFL win
Graeme Souness has four-word message for Virgl van Dijk after Man United complaints
Arsenal get Porto and Man City land Copenhagen as Champions League last-16 draw revealed
Full coverage of Champions League Round of 16 draw as Arsenal and Man City discover fate
But with Urawa Red Diamonds standing between Man City and the Club World Cup final, Kovacic will be desperate to step away from the crowded pack to claim the record for himself.