[3] Partnering Lloyd Glasspool, Heliövaara won his first ATP Tour title at the 2021 Open 13 against Sander Arends and David Pel of the Netherlands in March, and his second at the 2021 Kremlin Cup with Dutch Matwé Middelkoop in October.

[6] They won their biggest title as partners at the ATP 500 2022 Hamburg European Open defeating Matwé Middelkoop and Rohan Bopanna.

At the 2022 Croatia Open Umag, they reached the semifinals defeating wildcard pair Mili Poljičak and Nino Serdarušić.

[16] At the sign-in line of the US Open, Heliövarra met Anna Danilina, asked if she wanted a partner for the mixed doubles tournament, and she accepted.

[18] In April, Heliövaara won his fifth title with his new partner Henry Patten at the Grand Prix Hassan II defeating second seeded Austrian duo of Alexander Erler and Lucas Miedler.

[22] The duo won their second ATP Tour title as a team, and sixth for Heliövaara defeating Albano Olivetti and Yuki Bhambri in the final.

[26][27] They defeated Australian duo Jordan Thompson and Max Purcell in the final, in a three-setter with three tiebreaks, saving three match points, to win their first Grand Slam title together.

[28][29][30][31] Heliövaara and Patten were runners-up at the China Open in October, losing in the final to top seeds Simone Bolelli and Andrea Vavassori.

[33] They followed this by reaching the semifinals at the Vienna Open, losing in a deciding tiebreak to wildcards and eventual champions Alexander Erler and Lucas Miedler after squandering two match points.

[35] At the ATP Finals, Heliövaara and Patten defeated world No.1 team Marcel Granollers and Horacio Zeballos in straight sets in their first group match.

[38][39][40] Heliövaara and Patten then secured first place in their group by winning their third match against Wesley Koolhof and Nikola Mektić in a deciding champions tiebreak.

[43][44] Alongside Patten, Heliövaara won the doubles title at the Australian Open, defeating third seeds Simone Bolelli and Andrea Vavassori in the final.