There´s a mistake on the official site, the stadium in Segovia is called Estadio Municipal La Albuera, 108 km north from Getafe where the first game is being played
Never been to Segovia so that's a good excuse. It's an hour or so from Madrid I'll go there for the day.
But public transport is going to be an issue, as far as I can see the last train back leaves at 21:37 http://www.renfe.com/EN/viajeros/index.html
May be best to stay overnight or club...