French U21 defender signs for Lyon, bolstering defensive system ahead of January transfer window.

Lyon have signed the French Under-21 defender, Antoine Griezmann, on a two-year contract extension. The move is expected to strengthen the club's defensive system heading into next season's January transfer window.

Griezmann, who has been with Lyon since he was just 16 years old, joins from Monaco where he spent two seasons. He made his debut for the club in 2015 and has since become a key player in the team's midfield.

The signing comes as Lyon continue their ambitious build-up for next season, which will see them compete in the Ligue 1 title race. The addition of Griezmann is seen as a boost to their defense, particularly after losing key defenders such as Pierre-Emerick Aubameyang to Arsenal earlier this year.

Griezmann's versatility and physicality make him a valuable asset to Lyon's squad. He can play both at right-back and central defender, providing depth to the team's backline. His ability to switch between positions also makes him a threat on the ball.

Lyon manager Claude Puel has praised Griezmann's professionalism and work ethic. "Antoine is a player we've had our eye on for some time, and I'm delighted to sign him," said Puel. "He's a great addition to our squad and we're looking forward to seeing what he can do for us next season."

With Griezmann joining, Lyon now have three defenders in their squad - Nicolas Pepe, Jérémy Mignard and Antoine Griezmann. This should provide plenty of options for Puel when it comes to choosing his starting lineup for upcoming matches.