There was a flurry of stoppage-time goals in the Premier League on Saturday — and one of them ended Liverpool’s 100% start to its title defense. And Manchester United’s latest loss was sealed by a stoppage-time goal for Brentford, which won 3-1. Mathias Jensen powered in a shot from the edge of the area for Brentford’s third goal in stoppage time. Another Chelsea sending-offLast weekend, Chelsea goalkeeper Robert Sanchez was sent off in the fifth minute of its loss at Man United. Brighton dominated after that, with Danny Welbeck equalizing in the 77th and both Maxim De Cuyper and Welbeck scoring in stoppage time.