Paul defeated Kevin Owens by disqualification at the event.
Wrexham face Blackburn Rovers on Monday evening.
Keane made the comments in 2017.
Diallo was an unused substitute against Newport County.
City will face Luton Town in the fifth round.
Klopp will leave Liverpool at the end of this season.
Xavi confirmed his departure on Saturday.
United have let several players leave on loan this month - this could throw a spanner in the works.
Mourinho was sacked by Roma last week.
Scholes retired for good in 2013.
Cena was shocked at Paul's joke.