World-renowned throw-in expert Thomas Grønnemark joins Arsenal as consultant to weaponise throw-ins – the Dane behind Liverpool’s set-piece transformation eyes more marginal gains for Arteta’s leaders

Former Liverpool consultant joins Gunners on part-time basis to enhance throw-ins – the Dane who once held the world record and transformed Andy Robertson‘s delivery

In a move highlighting Mikel Arteta‘s relentless pursuit of marginal gains, Arsenal have brought in renowned throw-in coach Thomas Grønnemark as a consultant to sharpen their set-piece arsenal during the Premier League title race.

The Danish specialist, widely regarded as the world’s leading expert in throw-ins, has already visited the club’s training ground to share his techniques on ball retention, quick transitions, and attacking organisation from throw-ins. Grønnemark joins on a part-time consultancy basis, complementing Arsenal’s existing set-piece prowess under coach Nicolas Jover — the Gunners lead the league with 14 set-piece goals this season (including 12 from corners) while conceding just five.

Grønnemark’s credentials are impeccable. A former Danish athlete and footballer, he held the Guinness World Record for the longest throw-in at 51.33 metres (set in 2010 using a front-flip technique).

His most famous club impact came at Liverpool under Jürgen Klopp (2018–2023), where he transformed the Reds from 18th to 1st in the Premier League for possession retention from throw-ins (jumping from 45.4% to 68.4%). He helped players like Andy Robertson dramatically increase his throwing distance from 19 metres to 27 metres, expanding his effective area by over 500 square metres.

Grønnemark’s philosophy revolves around three types of throw-ins: long, fast, and clever — focusing not just on distance but on intelligence, movement, and tactical exploitation. With 40–60 throw-ins per match often underutilised, he believes this overlooked area can be a genuine weapon.

Arsenal, sitting six points clear at the top, are yet to score directly from throw-ins this campaign (one of only five teams without one since last season), but with long throws gaining traction league-wide (25 goals from throw-in routines this term vs. 20 last), Grønnemark’s expertise could prove decisive.

The Dane has also consulted for clubs like Brentford (Premier League leaders in long-throw goals), Ajax, Borussia Dortmund, and FC Midtjylland.