Police are investigating threatening text messages sent to the wife of Premier League referee Michael Oliver following his role in last the UEFA Champions League fixture involving Real Madrid and Juventus.
Oliver awarded a last-minute penalty on Wednesday as Real Madrid knocked Juventus out of the Champions League and was criticised by Italian keeper Gianluigi Buffon and some Italian media.
Barcelona legend Maradona backs Buffon over Ronaldo
Ronaldo's brilliant gesture to Buffon receives commendation
Referees have their say on Benatia foul on Vazquez
Buffon makes statement on his future after UCL red card
In a dramatic end to the match at the Bernabeu in Madrid, Juventus captain and Italy international Buffon was sent off for confronting Oliver over the 93rd-minute penalty decision.
He later told media the English official had a "bag of rubbish for a heart". On Saturday, Buffon defended his comments, saying he "stands by all of it".
BBC Sport understands Oliver's wife Lucy - a Women's Super League referee who also officiates men's non-league football - had her mobile number posted on social media after the game, which led to the abusive texts.
Police are also looking into reports of people banging on the front door of the couple's home address and shouting abuse through their letterbox.
Officers have now deactivated the phone number, although Lucy Oliver's social media account has also been targeted by some supporters.