The English Football League has opened an inquiry after a Southampton performance analyst was caught filming Middlesbrough’s training session on Thursday morning. The analyst allegedly recorded video and snapped tactical photographs on the Teesside club’s private ground before the Championship play‑off semi‑final. Officials escorted the staff member out and ordered the footage destroyed under strict club guidelines.

Middlesbrough lodged a formal complaint, prompting the EFL to demand Southampton’s observations on the incident. In a statement released Thursday evening, the league said it had written to the club requesting a full account. The alleged breach comes just days before the first leg at Riverside Stadium on Saturday, with the return fixture scheduled for Tuesday at St Mary’s and may influence each manager's tactics.

Both sides now face a distraction that could affect preparation for the two‑leg tie, which determines the final promotion slot to the Premier League. Should the inquiry find a breach, sanctions could range from fines to restrictions on staff access. As the semi‑final looms, clubs will need to keep focus on the pitch rather than the controversy. Fans will watch closely for any official ruling.