Roberto Di Matteo: we must fight racism 'with all our power'

Chelsea manager Roberto Di Matteo says the sport needs to fight racism "with all [its] power" after recent high-profile incidents put the problem back in the spotlight.

The Blues accused referee Mark Clattenburg of making a racist remark to their midfielder John Mikel Obi during their 3-2 defeat by Manchester United at Stamford Bridge on Sunday.

Di Matteo says racism is "a problem that we have in society", but insists Chelsea "will support anyone who is fighting [discrimination]".