With the transfer window due to close in under two weeks, Brendan Rodgers still has a bit of work to do to strengthen his Celtic team for the upcoming Champions League campaign. The Celtic boss has already added four players to his ranks after the capture of Viljami Sinisalo, Kasper Schmeichel and the returning former loanees, Paulo Bernardo and £9.5m man, Adam Idah. With Rodgers still needing to strengthen other key areas of the team, Jeff Stelling suggested that Celtic could be a destination for Chelsea forward, Raheem Sterling. Chelsea forward put forward for Celtic moveThere has been a bit…