2009-10: Viktor Loov made his SuperElit league U20 debut, skating in 12 games for Sodertalje, and was a key defender on the Sodertalje U18 squad. Loov played 10 of his 12 games with Sodertalje's U20 team in the second phase of the schedule and finished an even plus-minus with 4 assists and 8 penalty minutes. In 21 regular season games for the Sodertalje U18 team he scored 4 goals with 14 assists and was plus-20 with 32 penalty minutes. Sodertalje advanced to the playoffs and in two playoff games Loov was an even plus/minus with no points and 4 penalty minutes.
2010-11: Loov made his pro hockey debut – appearing in one game for Sodertalje during the Kvalserien playoff series – and was the second-leading scorer amongst defensemen for the Sodertalje U20 team. Loov had no points nor penalty minutes in limited action with the men's team. Sodertalje finished third in the six-team tournament and was relegated to AllSvenskan for 2012-13. In 42 SuperElit games with Sodertalje U20 he scored 4 goals with a team-leading 19 assists and was an even plus/minus with 36 penalty minutes. Sodertalje was eliminated by Malmo in a two-game playoff series. Loov was minus-one with no points and 2 penalty minutes in the playoffs.
2011-12: Loov played in 50 games for Sodertalje in Sweden's Allsvenskan (second division) and appeared in nine games for the club's U20 team (including four playoff contests). He scored 3 goals with 3 assists and was minus-eight with 42 penalty minutes in men's team play. Sodertalje finished ninth in the 14-team league; missing the playoffs. In nine games with the Sodertalje U20 team, Loov scored 2 goals (both in the playoffs) and had 3 assists with an even plus/minus and 2 penalty minutes. After finishing 10th, Sodertalje U20 defeated Brynas in the first round before falling to HV71. Loov, in his third year of draft eligibility, was selected by Toronto in the seventh round (209th overall) of the 2012 NHL Draft.
Loov is playing for Södertälje in the Swedish Allsvenskan league for the 2012-13 season.