Celta had started brightly as Iago Aspas beat the offside trap and controlled a long ball forward on the edge of the area.

The visitors' top scorer, though, could not apply the finish as his tame chip over the onrushing Thibaut Courtois was easily cleared away.

Real made Celta pay for failing to take their chances as they went straight up the other end and broke the deadlock themselves.

Asensio was set free on the left flank and he floated over a cross to the back post, where Vazquez was on hand to head Real into a sixth-minute lead.

Clear-cut opportunities were hard to come by in the remainder of the first half, with Celta unable to make the most of a spell of pressure before home full-back Dani Carvajal shot wide shortly before the interval.

Celta were dealt a blow early in the second half as Aspas picked up an injury and had to come off in the 52nd minute.

Things went from bad to worse for the away side just one minute later when Asensio doubled Real's advantage.

After Luka Modric won the ball back just inside Celta's half, Casemiro picked out Vazquez, who beat his man before teeing up Asensio for a fine finish from 12 yards.

Real continued to create chances immediately after scoring their second goal, with Karim Benzema firing narrowly wide just past the hour mark.

Celta substitute Miguel Baeza had a good chance to pull a goal back in the closing stages but his effort was blocked by Nacho.