Ilkay Gundogan stroked home a stoppage time penalty to grab champions Barcelona a barely deserved 2-1 win at Las Palmas on Thursday.
Xavi Hernandez's side badly needed to win after leaders Real Madrid and Girona did so on Wednesday, with victory leaving the Catalans seven points behind the top two.
Athletic Bilbao are fourth after a solid 2-0 win at Sevilla earlier Thursday, with Atletico Madrid fifth following their dramatic 4-3 defeat by Girona.
Barca were at times outplayed by the mid-table Canary Islanders, who took the lead through former Blaugrana striker Munir El Haddadi in the 12th minute.
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