Born in Tashkent, Mirzaev first took an interest in football at the age of seven, after watching Portuguese international Cristiano Ronaldo play.[1] After suffering a serious injury, he stepped away from the game to recover, before returning in 2019, when he joined the Odil Ahmedov Football Academy.[1]
He joined then-Super League side Lokomotiv Tashkent for the 2022 season, and would go on to make his professional debut on 12 November, coming on as a late second-half substitute for Jerome Mpasko in a 3–1 win against Metallurg Bekabad.[2] In January of the following year, he signed his first professional contract with the club, despite their relegation to the Pro League.[3]
International career
In 2021, Mirzaev represented Uzbekistan at both under-15 and under-16 level, scoring a brace for the latter in a 2–1 away win against the United Arab Emirates on 23 December.[1][4] The following year he continued to represent the Uzbekistan under-16 team, scoring the only goal in a 1–0 friendly win over the under-18 squad of Pakhtakor, before captaining the side as they played at the Mirabror Usmanov Memorial Cup.[5][6]
Later in 2022, Mirzaev scored a hat-trick against Brunei in a resounding 14–0 2023 AFC U-17 Asian Cup qualification win, before following this up with a free-kick equalising goal in an eventual 3–2 win over South Korea, helping Uzbekistan qualify for the 2023 AFC U-17 Asian Cup.[1] At the competition proper, Mirzaev could not prevent Uzbekistan's defeat to South Korea in the semi-finals, stating "We have come a long way to this tournament. We played good matches. The most important thing is to qualify for the World Cup."[7]