Rangers host St Mirren at Ibrox on Wednesday at 19:45 BST aiming for a fourth successive Scottish Premiership win to close the gap on leaders Celtic. Derek McInnes said he does not think the pressure lifts until a trophy is won, as his side trail third-placed St Mirren on goal difference despite sitting second with 13 points from six games. Rangers have won their last two league games against St Mirren by the odd goal, including a 1-0 victory on September 9 thanks to a 90+1st minute Bojan Miovski goal assisted by Ryan Naderi. That result followed wins over Motherwell, Aberdeen and Falkirk, extending their recent form to WWWWL from the last five games. James Penrice has started each game since his Rangers debut after scoring and assisting in the Premier Sports Cup win over St Mirren last month, during which Rangers had the run of midfield. Olwethu Makhanya and Emmanuel Fernandez have also started every game since Penrice's debut, though Fernandez is prone to the odd wobble at centre-back. Lawrence Shankland's injury could keep him out for up to four months, potentially accelerating Kevin Kelsy's need to adapt to his new surroundings at Ibrox. Craig McLeish, St Mirren head coach, said he is not surprised his team's performance has come together quickly, noting it might look that way from outside. Paul Nsio cannot play against his parent club Rangers due to ownership rules. Celtic travel to Perth to face St Johnstone on Wednesday at 20:00 BST, having bounced back from Champions League qualifying trauma in Austria and added new faces at the end of the transfer window. Yang Hyun-jun scored the decisive finish in Celtic's win over St Johnstone but is now away with South Korea for the Asian Games, leaving Sebastian Tounekti as a potential replacement. Camilo Duran contributed three goals and two assists in three games at centre-forward for Celtic, while Shim Mheuka could make his first start and Oliver Sorensen has seen recent bench use. Kasper Hogh and Kieran Tierney are in contention after brief injury spells, and Martin O'Neill aims to build on their perfect domestic record ahead of the Premier Sports Cup quarter-final against Rangers at Ibrox on Sunday. St Johnstone hunt a third consecutive home win at McDiarmid Park, though they have yet to keep a league clean sheet this season, with Cheick Diabate and Zach Mitchell described as a no-nonsense centre-back pairing. Simo Valakari is their head coach, and O'Neill last managed in Perth 25 years ago, prior to St Johnstone's April 2025 home win over Celtic during a relegation season. Rangers sit second in the Premiership on 13 points after six games, with a goal difference of +3 from seven goals scored and four conceded, and are five points behind Celtic. The next fixture is Dundee at home on December 30, 2026, with Dundee currently sixth in the table.