The Basque club are currently second in the La Liga table, one point behind leaders Atletico Madrid, while Eibar occupy 11th spot, having also made an encouraging start to the season.
Sociedad's league form this season has been excellent, winning seven, drawing four and losing just one of their 12 matches to collect 25 points, but they were knocked off top spot by Atletico last weekend.
The Basque outfit are just one point off the summit, although they have played two more matches than Atletico, who have a huge game away to bitter rivals Real Madrid on Saturday night.
Sociedad have actually not lost in any competition since a 1-0 reverse at home to Napoli in the Europa League at the end of October, although they have drawn each of their last five matches.
Imanol Alguacil's side will enter this game off the back of a 1-1 draw with Napoli in Naples, which saw them book their spot in the knockout round of the Europa League behind the Italian giants.
La Real have also drawn with Villarreal and Alaves in their last two league games but will be determined to return to winning ways on Sunday ahead of a huge fixture away to Barcelona on December 16.
Eibar, meanwhile, will bring a four-game unbeaten run into this contest, having drawn with Huesca, Getafe and Valencia, in addition to beating Real Betis, during the month of November.
An encouraging start to the 2020-21 campaign has seen Jose Luis Mendilibar's side collect 14 points from 12 matches, which has left them in 11th position in the table.
Eibar are actually only four points off fifth-placed Cadiz, while they have lost just one of their last eight league games during a strong run of form, which includes a standout 1-0 win at Sevilla on October 24.
Los Armeros, who finished 14th in La Liga last season, will be the underdogs heading into this weekend's contest, but they have had much longer to prepare for the contest.
That said, Sociedad recorded victories in both league games between the two teams last season, including a comfortable 4-1 success in the corresponding match in November 2019.
Real Sociedad La Liga form: WWWWDD
Real Sociedad form (all competitions): WDDDDD
Eibar La Liga form: WLDDWD
Ander Barrenetxea and Martin Merquelanz are both pushing for starts in the final third, while Adnan Januzaj should also feature alongside Alexander Isak in an attacking position, with Willian Jose and Portu potentially starting the contest on the bench following a difficult game in Naples.
Real Sociedad possible starting lineup:
Remiro; Gorosabel, Elustondo, Le Normand, Munoz; D Silva, Zubimendi, Merino; Januzaj, Isak, Merquelanz
Eibar possible starting lineup:
Dmitrovic; Correa, Burgos, Bigas, Arbilla; Inui, Exposito, Diop, Gil; Muto, Kike
We say: Real Sociedad 2-1 Eibar
Eibar are certainly a team to be respected at this level of football, but we are finding it difficult to back the visitors to pick something up here. Sociedad will not have had long to prepare for the contest following their exertions in the Europa League, but the Basque side should have enough to collect all three points.