Atletico Madrid and Borussia Dortmund do battle on Wednesday with both teams conscious the tie offers their best chance of reaching the Champions League semi-finals in years. The duo are the underdog sides remaining in this season's quarter-finals, with the other six teams either among the elite, spending as if they were or boasting trophy-laden European histories. Atletico, who suffered a humiliating group stage exit last season, are fighting desperately to finish in the top four in La Liga, under pressure from Athletic Bilbao for the final Champions League qualifying spot.