Partick Thistle and Celtic face off in the Premier Sports Cup quarter-final at Firhill Stadium on Sunday. The Jags have been in impressive form under manager Mark Wilson, having won four of their last five matches across all competitions. Partick Thistle secured their quarter-final spot with a comfortable 2-0 victory over Ayr United in the previous round, with goals from Daniel O'Reilly and Tony Watt. Manager Wilson, a former Celtic player, has built a squad with strong momentum this season. The Championship side currently sits third in the league table with 10 points from five games. Key players Logan Chalmers, Aidan Fitzpatrick, and Tony Watt have been instrumental in their recent success, with the team remaining unbeaten at home this season. Celtic approach this tie amid some controversy off the pitch, but manager Brendan Rodgers remains focused on defending their League Cup title. The Bhoys secured their quarter-final place with an emphatic 4-1 victory over Falkirk, featuring goals from multiple players including a debut strike for Dane Murray. Several key players remain sidelined through injury, including Alistair Johnston, who continues his recovery from a hamstring injury sustained against Kairat Almaty. New signing Kelechi Iheanacho made an immediate impact on his debut last weekend, scoring a crucial 96th-minute penalty winner against Kilmarnock. Partick Thistle's recent form has been excellent, with the team winning their last four matches in all competitions. Their most recent victory came against Airdrieonians with a 2-1 comeback win, maintaining their strong home record this season. The Jags swept through the League Cup group stage with four straight victories and have shown resilience in the Championship. Celtic returned to the top of the Scottish Premiership following a dramatic 2-1 win over Kilmarnock last weekend. Despite some early season struggles to find their rhythm, Brendan Rodgers' side remain unbeaten domestically this campaign. The champions have faced challenges on and off the pitch, most notably in their failure to qualify for the Champions League, losing on penalties to Kairat Almaty. Partick Thistle's match against Celtic is completely sold out, which will provide significant revenue for the Championship club. Manager Wilson revealed that drawing Celtic has provided a crucial financial boost to the club, helping to save jobs at the Maryhill outfit. The match kicks off at 3:30pm BST on Sunday at Firhill Stadium, with the Jags looking to cause an upset against the defending champions.