What Is 's-Hertogenbosch Open

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Last updated: April 10, 2026

Quick Answer: The Libéma Open, officially known as the 's-Hertogenbosch Open, is a prestigious grass-court tennis tournament held annually in June in Rosmalen, Netherlands, serving as an ATP 250 and WTA 250 event. The tournament features 32 singles players and 16 doubles teams competing on outdoor grass courts at Autotron, attracting some of the world's top tennis professionals preparing for Wimbledon.

Key Facts

Held annually in June at Autotron Rosmalen in 's-Hertogenbosch, Netherlands since 1996 for women's tennis
Classified as ATP 250 and WTA 250 tournament with 32 singles and 16 doubles teams competing
Played on outdoor grass courts, making it a crucial preparation event before Wimbledon
Sponsored by Libéma since 2018; formerly known as UNICOH Open, Ordina Open, and Heineken Trophy
2025 champions: Gabriel Diallo (ATP) and Elise Mertens (WTA); 2026 edition scheduled June 6-14

Overview

The Libéma Open, commonly referred to as the 's-Hertogenbosch Open, is one of the most prestigious grass-court tennis tournaments in Europe, held annually in the historic city of 's-Hertogenbosch in the Netherlands. Located at Autotron Rosmalen convention center on the outskirts of the city, this tournament has become a staple on the professional tennis calendar since its establishment in the 1990s, with the women's competition dating back to 1996. The tournament is sanctioned by both the ATP Tour and WTA Tour, making it a significant event for both men's and women's professional tennis.

The Libéma Open attracts elite tennis players from around the world seeking to compete on grass courts and refine their techniques ahead of the prestigious Wimbledon Championship in July. The tournament's grass surface and competitive field make it one of the most important preparation events for Wimbledon aspirants. Sponsored by Libéma, a Dutch insurance company, the tournament has undergone several sponsorship changes throughout its history, previously being known as the UNICEF Open, Ordina Open, Heineken Trophy, and RICOH Open before adopting its current name in 2018.

How It Works

The 's-Hertogenbosch Open follows the standard format and structure of professional tennis tournaments recognized by the ATP and WTA Tours:

Tournament Format: The event features 32 singles competitors in both men's and women's divisions, with 16 doubles teams in each category. Matches are played in a knockout format with players advancing through rounds until champions are crowned.
Court Surface: All matches are contested on outdoor grass courts, the traditional surface used in professional tennis and the same surface featured at Wimbledon. The grass courts at Autotron require specialized maintenance and preparation to meet professional standards.
Scheduling: The tournament is held annually in June, typically spanning one week (usually June 9-15, with 2026 scheduled for June 6-14). This timing allows players to complete their grass-court preparation immediately before Wimbledon qualifications and the main tournament.
Prize Distribution: As an ATP 250 and WTA 250 event, the tournament offers significant prize money and ranking points to competitors. Winners receive substantial compensation alongside crucial ranking points that affect their year-end standings and seeding positions.
Venue and Capacity: The tournament is held at Autotron, a modern convention and sports facility in Rosmalen, just outside 's-Hertogenbosch. The venue accommodates thousands of spectators across multiple grass courts and viewing areas.

Key Comparisons

Aspect	's-Hertogenbosch Open	Wimbledon	Other Grass Court Events
Timing	Early June (9-15)	Late June-July	Various (May-July)
Tournament Level	ATP 250 / WTA 250	Grand Slam	ATP 500, Challengers
Location	Rosmalen, Netherlands	London, England	Multiple global locations
Significance	Primary Wimbledon preparation	Highest professional ranking	Secondary preparation events
Prize Money	Moderate (€1M+ combined)	Highest in tennis (£50M+)	Lower tier events

Why It Matters

Wimbledon Preparation: The tournament serves as the ideal final preparation event for Wimbledon, allowing players to gain match experience on grass courts just weeks before tennis's oldest and most prestigious Grand Slam championship.
Grass Court Mastery: Success at the 's-Hertogenbosch Open demonstrates a player's ability to adapt to grass-court conditions, which require fundamentally different techniques and strategies compared to hard courts and clay.
Career-Defining Moments: The tournament has hosted numerous historic performances, with champions like Nicolas Mahut and Patrick Rafter winning multiple titles. Lleyton Hewitt remains the youngest champion, achieving victory at age 20 in 2001.
Ranking Points and Prize Money: As a 250-level event, the tournament provides substantial ranking points that contribute significantly to players' annual point totals and seeding positions in major tournaments, potentially affecting their path through draws.

The 's-Hertogenbosch Open represents a critical juncture in the professional tennis calendar, serving as the gateway between spring hard-court seasons and the grass-court majors. Recent champions including Gabriel Diallo (2025 ATP) and Elise Mertens (2025 WTA, defending her 2026 title) underscore the tournament's role in launching players toward Wimbledon glory. Its combination of elite-level competition, grass-court conditions, and strategic timing in the tennis calendar makes the Libéma Open an essential tournament for understanding modern professional tennis dynamics and player preparation strategies.