The Europa quarter finals and CL quarter finals are both on 3 days before, and 3 days after Liverpool v Chelsea. Chelsea are playing Malamo in the last 32, and are likely to reach the quarter final. Chelsea can not play Europa on a Thursday, and the following Saturday. Liverpool can not play on a Monday the same midweek as the Champions League. With the fixtures announced for TV before we know that either Liverpool or Chelsea are knocked out before the quarter final, it is almost certainly to be played on the Sunday on Sky.