Barcelona register 2-1 win over Osasuna
Barcelona beat Osasuna 2-1 and move five points clear at the top of La Liga.
Pique, 35, was dismissed despite being on the bench after appearing to remonstrate with the referee.
He was angered by the decision to show Robert Lewandowski a second yellow card in the 31st minute.
David Garcia gave Osasuna the lead, before Pedri and Raphinha struck.
After receiving a booking for an aerial challenge on Garcia, Lewandowski was sent off for just the second time in his car