Career
Since 2010, David has been the Head Coach at Team-BathMCTA and is also the author of the book Locker Room Power: Building an Athlete’s Mind. David has coached players including Liam Broady,Arvind Parmar, Barry Cowan, Wesley Moodie, Martin Lee and Andrew Richardson. David began coaching at The Metselaers club in Schevingen, the Netherlands in 1987 whilst still representing the club as a player, assisting with their promotion to the top division.
In 1989 after captaining the Manchester Mortgage Corporation League team, he accepted the Head Coach position at the Matchpoint Indoor Club.
Sammel went on to work with a number of players including Jamie Delgado, Arvind Parmar, Andrew Richardson, Martin Lee, Chris Haggard, Barry Cowan, Miles MacLagan and Samantha Murray. In 2001, Barry Cowan extended Pete Sampras to five sets in the memorable "You"ll never walk alone" court one encounter.
In September 2014, David began working with Liam Broady alongside Mark Hilton, Ric Moylan and Adrian Tannock. David is an officially recognised Association of Tennis Professionals Tour Coach.
In 2006, David founded the Monte Carlo Tennis Academy (MCTA) in Monaco alongside fitness trainer, Jez Green, who left in December 2008 to become Andy Murray"s trainer.
The purpose of the academy was to discover, train and manage junior tennis players into top professionals. Players training at the academy included Anna Fitzpatrick, Stefania Boffa, Ana Veselinović, Henri Kontinen, Christina Mathis and Ilija Vucic. Fitzpatrick was a 2007 junior Wimbledon semi-finalist.
Kontinen was a 2008 Wimbledon junior finalist.
The loss of sponsorship in 2008 curtailed the growing success of the academy. In 2010, the MCTA relocated and joined with Bath University to form David provides Sports Psychology & Workshops and for professional sports teams and coaches.
He has provided consultancy for football clubs including Chelsea, Fulham and Bolton Wanderers. In January 2015, David released the first episode of the Locker Room Power in which he discusses sporting events and sports psychology.