MADRID (AP) -- Freezing temperatures and poor defending cost Barcelona as the defending Spanish champion's league hopes took a big hit after losing 3-2 at Osasuna on Saturday.
Barcelona, already trailing leader Real Madrid by seven points, went down 2-0 after 22 minutes as Osasuna striker Dejan Lekic took advantage of poor defending to score both.
Barcelona hadn't recovered from a two-goal halftime deficit in 50 years, but Alexis Sanchez provided hope with a 51st-minute goal.
Raul Garcia re-established Osasuna's two-goal advantage five minutes later, with Barcelona's rally ending with Cristian Tello's 73rd-minute strike.
Madrid can stretch its lead over Barcelona to 10 points with a victory over Levante on Sunday.