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The Nigerian defender has signed an 18-month deal with Gary Holt's side.
The tournament gives fringe players a chance but Kerr wants victory in Spain.
The club will encounter Video Assistant Referees in the knockout stage of the Europa League.
Celtic and Rangers have both turned professional ahead of the new season.
The Motherwell boss admitted it was difficult to replace James Scott and Devante Cole.
The Ibrox boss believes referee Euan Anderson should've awarded Rangers a penalty for an apparent handball.
Celtic edged a 2-1 win against Aberdeen in blustery conditions after a late Kristoffer Ajer strike.
Neither side lost ground in the relegation battle as Hearts drew 2-2 with Hamilton.
The Premiership clash, which was postponed after a pitch inspection, will now take place on Sunday.
Gerrard convinced he can make Rangers fans happy despite falling behind in the title race.
Daniel Stendel is considering making a change between the sticks for relegation crunch at Tynecastle.
Rugby Park club launch investigation after racist abuse allegedly aimed at Rangers striker.
The full-back says he's enjoying his best spell since moving from Kilmarnock.
The Rangers captain said the team's second-half against Kilmarnock was "shocking".
Christian Doidge and Marc McNulty both hit the net in the 3-0 win over Ross County.
Celtic moved ten points clear of Rangers with a 5-0 win over Hearts.
The Rangers manager said his team's second half performance was "very worrying".
The Killie boss hailed his players after "a great night for the football club."
Celtic beat Hearts 5-0 as Rangers were beaten 2-1 by Kilmarnock.
A banner paying tribute to Jackie McNamara was unveiled as he recovers in hospital from a brain bleed.