La Real are on an impressive run of form with the Basques winning 10 of their last 14 Liga matches, a sequence which has elevated them firmly into the battle for a Champions League place.
Villarreal meanwhile remain tough to beat, yet Fran Escriba's side have become La Liga's draw specialists, with no side seeing more of their matches ending in stalemates.
Indeed, three of the Yellow Submarine's last four away league games have ended 0-0, and while Villarreal boast the division's meanest defence they have struggled somewhat in the final third. Another draw here is priced at 23/10 (3.30).
Only one side in the Primera Division has scored fewer than Villarreal's eight away goals this season, and with Real Sociedad boasting a formidable home record the visitors are clear outsiders. Betfair offer a win for the side from Castellon at 10/3 (4.33) while La Real can be backed at 10/11 (1.91) to record their eighth home win of the season and that looks like an appealing price.
It is worth bearing in mind that Villarreal were in Europa League action on Thursday night against Roma and the midday kick off time on Sunday will do Escriba's men few favours. The game against the Italian side saw Villarreal concede four goals at home for the first time in seven years, and the disasterous 4-0 scoreline means that the side are practically out of the tournament even before next week's second leg.
Unlike the visitors, La Real have had the entire week to prepare for the clash and should be fresher both physically and mentally.
Villarreal's away form by contrast is poor, with their only two road wins this season coming at struggling Malaga and Sporting Gijon, while their two defeats away from home have both come in the Basque Country at Eibar and Athletic Bilbao. With the visitors devoid of morale and the hosts in fine form at home, backing a win for Real Sociedad seems the logical selection, especially at 10/11 (1.91).