The individuals involved in the case could face further sanctions.
The FA have confirmed they've now launched an investigation into Southampton, after the club admitted to spying on rival sides this season.
They've been thrown out of the Championship play-off final this week by the EFL.
Middlesbrough will now take on Hull at Wembley on Saturday for a place in the Premier League.
Southampton have called the ruling "an extremely disappointing outcome".
The FA could now charge the individuals involved in the case with further sanctions.
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