Steven Gerrard's Glasgow Rangers will lock horns with the Polish side first away, then at Ibrox for a place in the Europa League group stage.
Glasgow Rangers brought Barker to Ibrox from Manchester City amid reported interest from Old Firm rivals Celtic.
Glasgow Rangers impressed at Ibrox this week as Steven Gerrard's side saw off Progres in front of the Bears.
Glasgow Rangers could potentially see Alfredo Morelos and Kyle Lafferty leave Ibrox this summer.
Glasgow Rangers academy duo Stephen Kelly and Cammy Palmer have temporarily swapped Ibrox and Steven Gerrard for the Scottish second tier.
Kyle Lafferty, Graham Dorrans, Jason Holt, Jordan Rossiter and Eros Grezda should leave Steven Gerrard’s Glasgow Rangers, suggests Ibrox legend Derek Johnstone.
Liverpool winger Ryan Kent was on loan at Steven Gerrard’s Ibrox club Glasgow Rangers last season.
Glasgow Rangers are currently in the Algarve for warm-weather training and Ibrox legend Johnstone is pleased with how it's going.
The Glasgow Rangers boss had an impressive first season at Ibrox but is being linked with clubs south of the border.
Glasgow Rangers have a very busy pre-season ahead of them with friendlies at Ibrox and Europa League qualifiers at home and away.
Xherdan Shaqiri joined Liverpool in the summer of 2018.
Leeds United reportedly baulked at the South American's price-tag.
The Tottenham Hotspur striker is a vitally important player for Mauricio Pochettino's side.
Gary Hooper won two Scottish Premiership titles with Celtic and he's now a free agent after leaving Sheffield Wednesday.
Steven Gerrard's Glasgow Rangers have bolstered their ranks this summer as they hope to knock Neil Lennon's Hoops off their perch and bring silverware to Ibrox away from Parkhead.
Spurs are heading to M11 on Saturday as Mauricio Pochettino seeks to deliver an early blow to Tottenham's Premier League rivals.
The Rangers manager Steven Gerrard added the midfielder to his Ibrox ranks on Thursday.
Ben White joined Leeds United on loan from Brighton and Hove Albion in the summer transfer window.
Arsenal new boys are in contention to start.
The Tottenham Hotspur defender has only recently returned to full first-team training.