There's a lot of support for Liverpool, Everton, Man United & to a lesser extent Arsenal in South Wales simply 'cos until recently the Welsh teams have been so s***. Growing up in the 80s, Newport County (who I always went to watch) went bust and had to start again, Cardiff and Swansea weren't exactly nice places to watch football unless you liked fighting - so most watched football on TV and Cardiff/Swansea got a couple of thousand at each game