Leicester extended their lead at the top of the Sky Bet Championship to 10 points after thrashing struggling Huddersfield 4-1.Tom Cannon scored twice and Ricardo Pereira and Stephy Mavididi were also on the scoresheet as Enzo Maresca's side continued their seemingly unstoppable march towards promotion back to the Premier League.Nearest rivals Ipswich were held to a second successive 0-0 draw at 10-man Stoke, who had Jordan Thompson sent off for a second bookable offence midway through the second half.Southampton also had to settle for a point at Norwich after Josh Sargent cancelled out Adam Armstrong's 70th-minute opener, a result which allowed Leeds to close the gap on the Saints to four points with a 3-0 win over Birmingham at Elland Road.Dan James set up Patrick Bamford for the opening goal and scored the second himself in first-half stoppage time, with Crysencio Summerville completing the scoring after the interval to increase the pressure on Blues boss Wayne Rooney.West Brom remain fifth in the table after losing to a 55th-minute Liam Cullen goal at Swansea, while a stunning strike from Alex Pritchard and a first goal for the club from Nazariy Rusyn gave play-off contenders Sunderland a 2-0 win over Preston in the lunchtime kick-off at the Stadium of Light.A late equaliser from Tom Eaves earned bottom side Rotherham a valuable point against Blackburn in a 2-2 draw at Ewood Park, where Irish international hopeful Sammie Szmodics score again for his 16th goal of the season, while Shaun Hutchinson snatched a 1-0 win for Millwall at Bristol City in the second minute of stoppage time.Coventry dented Middlesbrough's play-off hopes with a superb 3-1 win at the Riverside Stadium,Tatsuhiro Sakamoto scoring twice as the