By Jamie Spencer Joao Cancelo was absent as Barcelona beat Atletico Madrid in La Liga over the weekend as a medical precaution following concerns over a possible heart condition. Cancelo has started 22 of the 26 league games that Barca have played since he arrived on loan from Manchester City late in the summer transfer window. That has predominantly been as a left-back since the turn of the calendar year, but his name missing from the squad list in Madrid was curious. It has become apparent from an RAC1 report that Cancelo received medical advice to sit the game out. One of the defender’s rel…