"It is very, very important that Tyson, having done his last five fights in the US, that he goes back and does a fight in the UK," Arum has toldSky Sports The eight sides finishing second in their Europa League group will be seeded and drawn against the eight sides who finished third in their Champions League groups. Please use Chrome browser for a more accessible video player "If it wasn't challenging already, it gets more challenging when you deal with certain things that are outside your control," he said.