It is serious foul play because he will be using excessive force and endangering the safety of the opponent.
Times, Sunday Times (2016)
But not with excessive force or violence.
The Sun (2016)
It was a reckless challenge with excessive force that endangered the player's safety.
The Sun (2016)
It was reckless and used excessive force, which endangered the opponent's safety.
The Sun (2017)
Six were reprimanded for using excessive force but all kept their jobs.
The Sun (2013)