Former Arsenal player, Charlie Nicholas insists Manchester United must invest in their playing squad when the transfer window reopens in January if they’re going to make the top four this season.United manager Jose Mourinho said on Friday that he is confident his team will break into the top four this season, despite being four points behind Arsenal who are fourth place on the Premier League table.Nicholas told Sky Sports’ The Debate:“Are they better than Arsenal? Probably when they are on their game. But they have to win games to close the gap and I am still not convinced they will make the top four.Maguire says United need to build on today’s win George Patchias – September 14, 2019 Harry Maguire wants his United teammates to build on the victory over Leicester City.During the summer, Harry Maguire was referred to as the ultimate…“Arsenal are catchable because their defence are trying to understand their new manager. Tottenham are going through a bit of a change and don’t seem to know their best formation. Chelsea are probably still too reliant on Eden Hazard but are probably above the two north London sides.“They are catchable, but United would need to go big in the market in January and sign readymade players.”The Red Devils face rivals, Manchester City on November 11, before games against Arsenal and Liverpool in December.