I'll be in London 22 March and am looking at premier league matches which I'm likely to get ticket (I just need 1 ticket). Unfortunately it's Chelsea vs Arsenal that day I was told I won't have a chance in getting a ticket. Another match is West Ham vs Man City but on the West Ham website all tickets are sold out. Nothing on viagogo yet. Any suggestions on where or how I can buy ticket reliably and what other match is on that day? Thanks a lot.