Forest Hills Tennis Academy
Lier, Belgium
What's new at Forest Hills Tennis Academy
One of today's pros grew up on these courts.
- Alexander Blockx #27 ATP, came at 17
A club tennis school run by coach Philippe Cassiers as CAS Tennis Academy, based since April 2025 at TC 't Sas in Lier, near Antwerp (before that at TC Forest Hills in Wommelgem). It offers weekly group and private lessons from age 2.5 to adults, a Pro Team for young tournament players, and holiday camps.
9 outdoor + 10 indoor courts (at TC 't Sas, Lier)
Programmes and prices
What they sell and what it costs, as published on Oct 10, 2026.
- Toddler tennis (Kleutertennis), white level: kids 2.5 to 6. €120 / winter season
- Kids tennis, blue and red levels: kids 5 to 8. €230 / winter season, group of 4 · €500
- Kids tennis, orange and green levels: kids 8 to 12. €355 group of 4 · €475 group of 3 · €690 group of 2
- Junior tennis, 12 and over: juniors 12 and over. €355 group of 4 · €475 group of 3
- Kids and junior Pro Team: kids and juniors aiming at tournaments. Price on request
- Conditioning (Conditie): kids from 5. Price on request
- Holiday camp, tennis + sport (Tennis- & omnisportkamp): kids and juniors. €155 / week
- Competition camp (Competitiekamp): juniors who play tournaments. €250 / week
- Spring lessons (Lentetennis): any age, groups by level. from €70 / season · €125 group of 4 · €160 group of 3 · €240 group of 2
- Adult group lessons: adults, groups of 2 to 4. €355 group of 4 · €475 group of 3
- Adult evening camp: adults, beginners and experienced. €125 / week
- Private lessons, kids and adults: adults and kids, beginners to experienced. Price on request
The facts
- Tennis courts: 19 (9 outdoor and 10 indoor at TC 't Sas in Lier, plus 8 padel courts)
- Coaches: 20–30 (qualified coaches, their own figure: "about twenty" on one page, "about thirty" on another)
- Coaches with the top diploma: 6 (hold the Flemish Trainer A diploma, their own figure)
- Winter lessons from: €120 (a season for the youngest; €355 for most groups of 4)
- Holiday camp from: €155 (a week of 5 days; competition camp €250)
- Children per coach: 2–4 (by colour level for kids 2.5 to 12, their own chart)
- Boarding: Not mentioned
- School on site: No, "more info soon"
- From age: 2.5
- Adults: Groups, private lessons, evening camp
- Visits: Not stated
- Campus: One club: TC 't Sas, Lier
- How to get in: Sign up with their form for winter lessons, summer lessons or a camp; groups by level and age; the Pro Team is chosen by the coaches
Coaches
- Philippe Cassiers, Founder and head coach, coaches Alexander Blockx
- Martine Cassiers, Co-founder
- Oleg Bojarsky, Conditioning coach, works with the academy
- Marc Lievens, Sports physiotherapist, works with the academy
- Valentijn Theelen, Junior coach, named on 2020–21 player cards
- Kenny Herscovici, Coach on 2020–21 player cards
- Cleo Dockx, Conditioning coach, named on 2020–21 player cards
- Kristof, Adult camp coach, first name only
Tournaments they host
- Winter club tournament. Dec 28, 2026 – Jan 3, 2027 at 't Sas; entry details not on their site
- Spring tournament week. May 18–24, 2026 at 't Sas; no lessons that week
Where it is
Mechelsesteenweg 380, 2500 Lier, Belgium.
Nearest airport: Brussels (BRU), 23 km
Also in Belgium
- TC Ter Linden 8 km, Antwerp. 1 pro raised, best Michael Geerts #347 ATP
- TC Odrimont 46 km, Lasne. 1 pro raised, best Jack Loge #506 ATP
- Justine Henin Academy 47 km, Limelette. 6 pros raised, best Elina Svitolina #6 WTA
- Tenkie Academy 61 km, Hasselt. 2 pros raised, best Hanne Vandewinkel #98 WTA
- Kim Clijsters Academy 74 km, Bree. 2 pros raised, best Sofia Costoulas #163 WTA
- LTA Academy 89 km, Maaseik. 1 pro raised, best Zizou Bergs #41 ATP
- TC Brughia 90 km, Sint-Kruis. 1 pro raised, best Jeline Vandromme #123 WTA
- Club de Visé 93 km, Visé. 1 pro raised, best Gauthier Onclin #178 ATP
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