Premier League has urged all those involved to stick to the rules if the season is to be completed. The warning comes amid growing fears that football's failure to follow strict protocols could ruin efforts to keep elite sport going during the current nationwide lockdown.The Premier League has introduced stronger regulations at clubs this week, in a bid to reduce the growing number of positive cases and postponed games.These include making substitutes wear masks when sat in the stands and banning "unnecessary contact at all times" between players, managers and coaching staff, including handshakes and hugging.