Mairis Briedis vs. Mike Perez was a professional boxing match contested on 30 September 2017, for the WBC cruiserweight championship.

[1] At the WBSS Draft Gala, which took place on 8 July in Monte Carlo, WBC champion Mairis Briedis chose former heavyweight contender Mike Perez (22–2–1, 14 KOs) as his quarter-final opponent.

Perez had been out of action for 25 months before moving down from the heavyweight division following a TKO loss to Alexander Povetkin and won his first fight at that weight with a first-round knockout on 10 June 2017.

[2] On 22 July, the WBSS announced the fight would take place in Briedis' home country of Latvia at the Rīga Arēna in Riga on 30 September 2017 and would be the third quarter final, coming a week after Yunier Dorticos knocked out Dmitry Kudryashov.

Briedis won a scrappy fight, beating Perez by unanimous decision after 12 rounds (116–110, 114–112, 115–111).