Chelsea sign midfielder Saul on loan from La Liga champions Atletico Madrid, option to buy included

The deal was thrown into doubt as the transfer had not been confirmed by either club before the midnight CET deadline with a problem with LaLiga's transfer registration system being the cause for the delay.

Premier League club Chelsea on Tuesday announced a late deadline day loan signing of Atletico Madrid and Spain midfielder Saul Niguez. We’re delighted to welcome @saulniguez to the club on a season-long loan! #HolaSaul The deal was thrown into doubt as the transfer had not been confirmed by either club before the midnight CET deadline.