Atletico Madrid have gone level on points at the top of La Liga as they came from behind to beat Athletic Bilbao 2-1 at the Vicente Calderon.
Luciano Vietto thought he had given his side the lead in the first half, but the striker's header was offside and the goal was chalked off the scoreboard.
Aritz Aduriz then had a chance for Bilbao after being put through on goal but his lofted effort was tipped over the bar by Jan Oblak.
Bilbao went ahead moments later from a corner as the ball was flicked on to Aymeric Laporte and the defender poked it home for a few yards out.
However, the home side drew level in added time just before the break as Saul managed to get his head to a Koke corner and nod in the hosts' equaliser.
In the second half, Aduriz had another chance to give his side the lead but his low strike was denied by the feet of Oblak in the Atletico goal.
Diego Simeone's side completed their comeback thanks to top scorer Antoine Griezmann, who hit a curling strike from outside the box that Bilbao goalkeeper Gorka Iraizoz could not get anywhere near to.
The hosts held off a late fightback to leave them behind Barcelona on goal difference, while Bilbao drop to ninth in La Liga.