Celtic and Celta Vigo meet at Celtic Park seeking their first points in this season's Europa League. Both lost their opening two European matches, despite arriving after wins in their domestic competitions.
The fixture offers a chance to turn national-league momentum into an improved European result, without either side having secured that response yet.
Celtic's contrasting campaigns
Martin O'Neill's team beat Hearts 7-1 and sit four points ahead of Rangers in Scotland. The preview records eight wins from their first nine domestic league games.
Their Europa League results have been a 3-1 home loss to Ferencváros and a 4-1 defeat at Benfica, leaving them 33rd in the overall standings.
Cameron Carter-Vickers remains affected by a muscle problem and Alistair Johnston is injured. Camilo Duran has nine goals and five assists in 15 matches in the figures cited, while Kasper Høgh has three goals and two assists in 12 appearances.
Celta look for a reset
Celta defeated Alavés 2-1 to stand eighth in La Liga, but have lost 1-0 to Omonia and 2-1 to Juventus in Europe.
Pablo Durán, Borja Iglesias, Carl Starfelt, Miguel Román and Jones El Abdellaoui missed the Alavés game and are considered likely absentees for Scotland in the preview. The final lineup remains unconfirmed.
Celta reached last season's quarter-finals, while Celtic also advanced to the knockout stage. That experience provides background to their current need for improvement rather than a guarantee of the result in Glasgow.