Arsenal manager Arsene Wenger said if a football manager goes "overboard" on the touchline they should be "punished".
"The rules are the rules", he added.
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The 90-year-old victim watched in horror from her bed as the thief climbed in through her bedroom window.
The remains of Sophie Lionnet, 21, were discovered in a garden at a house in Southfields, south-west London last year.
Port drugged and raped four young men and dumped their bodies near his home in Barking, east London.