By Felix Keith Mauricio Pochettino has admitted his players have to “step up” for Chelsea in the New Year, rather than the club relying on making yet more signings. Chelsea ended 2023 on a high with a 3-2 win over Luton on Saturday thanks to a stunning performance from Cole Palmer. The £40million summer signing scored twice to add to a strike from Noni Madueke put the Blues 3-0 up at Kenilworth Road. Luton hit back late on through Ross Barkley’s header and Elijah Adebayo’s rebound to make it a nervy finish, but although they hit the bar twice and had a goal ruled out for offside, they could no…