2) David Alaba
Although this is more likely to happen at the end of the season, Bayern Munich may opt to sell the Austrian international next month to prevent him leaving on a free transfer when his contract expires.
Manchester City, Manchester United, Barcelona, Real Madrid and Paris Saint-Germain have all been tipped to make moves for Alaba so Chelsea could steal a march on the competition by making an offer in January. Failing that, they could still sign him up to a pre-contract agreement.