LONDON (AP):Willian scored twice as leaders Chelsea overcame Stoke 4-2 to equal an English Premier League record for 13 straight wins in a single season.Bruno Martins Indi and Peter Crouch struck for Stoke to cancel out goals by Gary Cahill and Willian. But Willian struck for a second time moments after Crouch’s 64th-minute equaliser and Diego Costa netted a fourth.”After the second goal it wasn’t easy to go and have the good reaction, to show the great character, above all after 12 wins in a row,” Chelsea manager Antonio Conte said. “When you win a lot, there is a great danger to be satisfied, to be relaxed.”six points clearChelsea are six points clear of Liverpool who beat Manchester City 1-0.Chelsea’s 34th-minute opener came when Cesc Fabregas’ corner was met by Cahill, who rose highest to head into the net.Stoke levelled a minute into the second half through Martins Indi. Stoke goalkeeper Lee Grant was beaten again in the 57th. Victor Moses centred for Eden Hazard, who laid the ball off for Willian to score.Other results: Burnley 4 Sunderland 1; Manchester United 2 Middlesbrough 1;Leicester 1 West Ham 0; Southampton 1 West Brom 2; Swansea 0 Bournemouth 3.