By Toby Cudworth Inconsistent has dogged Barcelona all season long, but injuries are now the primary concern for head coach Xavi ahead of a busy run of fixtures. The Catalan giants are eight points off the pace in La Liga, are already out of the Copa del Rey after a crushing loss at Athletic Club, and are not regarded as favourites to win this season’s Champions League, despite a creditable draw against Napoli in the first leg of their round of 16 tie. With Mallorca the next visitors to the Estadi Olimpic Lluis Companys Stadium – Barca’s temporary home while Camp Nou is renovated – there could…