WARNING - OFFENSIVE LANGUAGE: The Champions League clash between Paris Saint-Germain and Istanbul Basaksehir was abandoned on Tuesday night after both sets of players walked off amid allegations of racism by fourth official Sebastian Coltescu. The Group H encounter was suspended midway through the first half after an incident on the touchline involving Pierre Webo, Basaksehir's assistant manager. After a lengthy delay at Parc des Princes, the game was eventually postponed and the remaining minutes will now be played on Wednesday at 6:55pm local time with a new refereeing team in charge, led by Holland's Danny Makkelie.

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Fixture congestion, player fatigue, injuries and a wide-open race for the 2021 Premier League title means the temptation - and the need - to spend big in the January transfer window has never been greater.But successful recruitment midwinter is notoriously difficult to do well. The aim is to not just relieve those on the front line, but to power the final push for glory, so new recruits will have to go straight into the action.To ensure they are signing players who will gel with their new team mates the moment they walk through the door, clubs are turning to artificial intelligence to evaluate footballers on and off-field characteristics to calculate who they will work well with. Sportsmail has been given access to the system developed by Ai Abacus. It finds the best matches for big names like, Dayot Upamecano (right) and Erling Haaland,(left), but throws up some unexpected targets, too