Villarreal started lively and looked to hurt the Basques, and were rewarded as they were awarded an early penalty. Gerard Moreno stepped up to convert, putting the visitors in front with just six minutes on the clock.
That forced La Real to wake up though, and they then pushed forward themselves in search of a leveller.
Mikel Oyarzabal drove them on and it was the No.10 who drew them level with a penalty of his own, but that wasn't free of controversy. The decision to award the kick wasn't itself controversial, but it came from a corner that shouldn't have been given.
Unfazed, though, Oyarzabal did his usual skip before dispatching it in for the equaliser.
The rigours of this season and the effects of playing in the Europa League took their toll after the break.