Manchester United fans have not shied away from showing their frustration in the club's owners recently and it seems the anger may spill over into next season.
Bosses at the club fear protests could erupt at United's pre-season friendlies abroad this summer, according to The Sun.
The demonstrations were sparked after the club announced their inclusion in the doomed European Super League in April.
One protest ended in supporters getting into Old Trafford and lighting flares on the pitch which meant United's Premier League match against Liverpool was postponed last weekend.
A source told the paper: “It’s a very difficult time for the people planning the security around the team and how they travel.”
Security was stepped up when the team travelled to Roma to play the second leg of their Europa League semi-final on Thursday
While the protests have started due to the ESL, fans have long sought the end to the family's ownership mainly due to how closed off they are.
Owner Joey Glazer said on Friday they will be more open with fans going forward and manager Ole Gunnar Solskjaer has called for the protests to end.
He said: "You don’t have to be a rocket scientist to see the challenges and the friction ahead — and it makes it more difficult for me and more difficult for the players.
“We have to focus on getting results. I want us all to unite.”
The demonstrations have lead to United facing three games in five days to fit in the rescheduled Liverpool clash, the first of which takes place against Aston Villa on Sunday.
