Manchester United has stepped up security checks at its Old Trafford ground after speculation terrorists were planning an attack there.
It is claimed those arrested had tickets for Saturday's game
United said extra security checks would be implemented ahead of the game with Charlton Athletic on Tuesday night.
It follows newspaper speculation that 10 people held in police raids on Monday all had tickets for Saturday's game between United and Liverpool.
The club said Greater Manchester Police had said both games should go ahead.
But it said an increased number of searches would be carried out and
warned supporters to get to the ground as early as possible to minimise delays.
A club statement said: "Supporters are requested not to bring bags to the match and arrive in good time to take their seats.
"We would also encourage all supporters to be particularly vigilant at this time and report anything regarded as suspicious to ground officials."
It added that it was not aware of any impending terrorist threat.
Newspapers speculated on Tuesday that there was a plan for a mass suicide bombing at Saturday's game.
Greater Manchester Police (GMP) led an operation on Monday in which nine men and a woman were arrested.
Six men and the woman were arrested in Manchester while one person was arrested in each of Staffordshire, West Midlands and South Yorkshire.
A GMP statement said: "We are confident that the steps that we have taken to date have significantly reduced any potential threat in the Greater Manchester area.
"We have of course been in touch with Manchester United FC today and have assured them that there is no reason why both [Tuesday's] game and Saturday's match against Liverpool should not go ahead."