Sporting claimed a 2-1 win over Minnesota United at Allianz Field to pull clear atop the Western Conference.
Michael Boxall's 55th-minute own goal proved decisive as Sporting claimed a fifth win in six MLS games, going four points clear of second-placed Minnesota United FC.
Gadi Kinda got on the end of a Jaylin Lindsey cross to give Peter Vermes' Sporting a 12th-minute lead.
Minnesota was level just after the half-hour mark, an unfortunate deflection off Lindsey leading to an own goal.
But Boxall turned a cross into his own net 10 minutes into the second half for what proved to be the winner.
Toronto recorded a second win in four days over Vancouver Whitecaps with a 1-0 victory.
Richie Laryea's low finish in the 15th minute was all Toronto needed, getting back to within a point of Eastern Conference leader Columbus Crew.
In the day's other games, Cincinnati and DC United drew 0-0, while Houston Dynamo's clash with Dallas also finished goalless.