He made the move into single-seaters in 2007, with a campaign in the inaugural Formula Renault 2.0 Northern European Cup.
Driving for SL Formula Racing, he finished twenty-first in the standings.
He also took part in two Eurocup Formula Renault 2.0 races with the same team, failing to score a point.
Sigachev missed the entire 2008 season due to sponsorship problems.
This biographical article related to Russian auto racing is a stub.