The Great City Games, an open and free event for the public, is due to take place in Manchester this weekend.
The FA Cup final, English Football League play-offs and the PGA golf Championship are also this week.
Manchester United cancelled a news conference today, due to be held prior to their Europa League final against Ajax in Stockholm tomorrow, and will wear black armbands for the match.
The club said: "Our thoughts are with the victims and their families at this terribly difficult time."
