There is one position that Chelsea have made it clear they are still keen to strengthen before the Premier League season gets underway. A new goalkeeper is very much on the agenda at Stamford Bridge, despite there being two recognisable first team options already in the squad. Robert Sanchez impressed new manager Enzo Maresca in the first pre-season friendly earlier this week, with him keeping a clean sheet in his time on the pitch. READ MORE: £25m Chelsea man says he is perfect for what new manager Enzo Maresca wantsThis contrasts to the consensus surrounding the other goalkeeper. There are d…