Very hard question. For the LB spot, I prefer Luis and Ivanovic against majority of the sides we face, especially at Stamford Bridge, but away from home and/or against the strongest teams, Azpilicueta. The RB spot is locked down by Brana for the foreseeable future. He's been a monster overlapping this season, his final ball has improved so much. He's also recently gotten even more solid defensively after some criticism at the start of the season. Our best fullback and one of our best players, period.