Both Chelsea and United must go shopping for goals

At Stamford Bridge, the strengths and weaknesses of both sides were in evidence

PROFLIGATE: Chelsea's Pierre-Emerick Aubameyang during the Premier League match at Stamford Bridge, London. Pic: John Walton/PA Wire

January, according to received wisdom, is no time to go buying expensive footballers.

The combination of limited supply and panicked, increasingly desperate buyers means the winter transfer window is the very essence of a seller's market.