 Complete the following phrase:  In March 2001, PSV faced 1. FC Kaiserslautern in an UEFA Cup fixture. During the match, fans were provoked by Kaiserslautern players, resulting in spectators attempting to break through a fence separating the stands and the field. After the gate was cracked, PSV coach Eric Gerets and several players had to personally stop the fans from entering the field. After this incident, problems with fan violence faded and in the summer of 2005, the PSV board decided to remove the tall fences around the pitch. They were replaced with 35 inches 90 cm high railings keeping the spectators off the grass. Unauthorized persons who do invade the pitch will receive a 15,000 penalty and a ten-year ban from visiting the Philips Stadion. The 