Adam Federici missed ben Sanchez 's shot to squirm through his legs . His error meant saints advanced to the FA Cup final after extra - time . Reading goalkeeper Steve costa has forced his goalkeeper to get back on track . The saints face Birmingham in the Championship on Wednesday day .
Adam Federici allowed Alexis Sanchez 's shot to squirm through his legs . His error meant Arsenal advanced to the FA Cup final after extra-time . Reading boss Steve Clarke has backed his goalkeeper to get back on track . The Royals face Birmingham in the Championship on Wednesday night .