Though many fringe players got a rare chance to start, none made more of the opportunity than teenager Kelechi Iheanacho, who scored a hat trick as City swept past Aston Villa 4-0. Iheanacho opened the scoring, and the 19-year-old striker converted a penalty 20 minutes later after Raheem Sterling was brought down in the area. Iheanacho struck again in the second half after a 30-yard (meter) run, and Sterling added City's fourth just two minutes after that. Victory over the team lying at the bottom of the Premier League keeps City in the hunt for an unprecedented trophy quadruple. Manuel Pellegrini's side is second in the league standings, has a place in the last 16 of the Champions League, and will take on Liverpool in the League Cup final at Wembley Stadium on Feb. 28. Down in north London, Alexis Sanchez scored one goal and made the other in Arsenal's 2-1 home victory over second-tier side Burnley. Sanchez set up defender Calum Chambers to give Arsenal the lead, only for Sam Vokes to head an equalizer for Burnley on the half-hour mark. Sanchez struck the winner after the break, turning home Alex Oxlade-Chamberlain's cross from close range. Nacer Chadli scored twice as Tottenham cruised to a 4-1 victory in the early kickoff at Colchester United, after a clash of heads left one of the home side's defenders in hospital. Colchester said Alex Wynter suffered a deep cut in his mouth and was slightly disorientated, but ''otherwise doing OK'' after colliding with teammate Tom Eastman in the opening minutes. Colchester, which is at the bottom of England's third tier, then managed to keep the Premier League title contender at bay until midway through the second half - when Eric Dier scored with a deflected shot. Chadli added his second with a header, but Colchester pulled a goal back when Gavin Massey's shot rebounded off the post and defender Ben Davies turned the ball into his own net. Tom Carroll added Spurs' fourth. The big upset of the day looked to be coming from the south coast, where fourth-tier Portsmouth was leading top-flight Bournemouth 1-0 until Josh King's equalizer in the 71st minute. Marc Pugh then scored a second for the Premier League side to earn a 2-1 victory. Elsewhere, West Bromwich Albion was held by third-tier Peterborough to 2-2, while Watford left it late to beat Nottingham Forest 1-0. Watford's top scorer, Odion Ighalo, came off the bench to get the only goal in the 89th minute. A solo effort by Wilfried Zaha gave Crystal Palace a 1-0 win over Stoke in an all-Premier League game. Liverpool rounded off the day's fourth round action in the late kickoff at home to West Ham. (For more sports news andupdates, followAhramOnlineSportson Twitter at@AO_Sportsand onFacebookatAhramOnlineSports.) http://english.ahram.org.eg/News/186314.aspx