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Sergio Busquets and Ivan Rakitic were critical of Barcelona's squad planning after they were held to a 1-1 draw at Napoli in the UEFA Champions League on Tuesday.
Busquets and Arturo Vidal will be suspended for the second leg of their last-16 tie, while Gerard Pique suffered an ankle injury in added time at the Stadio San Paolo.
Per Sport, Busquets said: "We had Arturo's red card, I hope Pique's thing is nothing. We'll take [the second leg] on with what we are. We're a small squad, unfortunately the planning was like this.