High Performance Coaching



Unlock your potential and take your tennis game to the next level with the power of a growth mindset. Join us for this mental workshop and learn how to embrace challenges, persist through obstacles, and achieve success on and off the court.

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In this workshop, we will explore how the concept of a growth mindset can be applied to the sport of tennis and how it can help you become a better player.

Tennis is a mentally challenging sport that requires a combination of physical skills, strategic thinking, and emotional control. To perform at your best, you need to have a positive mindset that enables you to face challenges, learn from mistakes, and constantly improve your game.

The growth mindset is a powerful tool that can help you achieve these goals. It is a belief that your abilities and talents are not fixed, but can be developed through hard work, dedication, and persistence. With a growth mindset, you are more likely to embrace challenges, persist in the face of obstacles, and see failures as opportunities for learning and growth.

In this workshop, we will explore how you can cultivate a growth mindset in tennis, and how you can use it to overcome obstacles, improve your game, and achieve your goals. We will discuss the key principles of the growth mindset, share practical tips and techniques, and explore real-life examples of tennis players who have applied these principles to achieve success.

Whether you are a beginner or an experienced player, this workshop will provide you with valuable insights and tools to help you develop a growth mindset and take your tennis game to the next level. So, let’s get started!


Zondag 12 maart 13:00-15:00 Workshop IJZERSTERK de competitie in te Weesp (volwassene) [NL], Zaterdag 18 maart 10:00-12:00 Workshop IJZERSTERK de competitie in te IJburg (volwassene) [NL]


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Hi Bastiaan. A quick note to say that after attending your courses, i achieved one of the items on my "fridge door bucket list" for 2022! I ran the half marathon in Amsterdam. Your courses in Weesp last spring, certainly were a factor in me achieving this. So thanks a lot for that. And the bonus was that i "smashed" my under 2 hour personal, with a time of 1:54:47. Thank you very much for the positive impact your courses & support had!
Sean Maguire
Member of Weesper Tennis Club
Hi Bastiaan. After participating to your workshops i gained much more awareness of the power of my thinking. I learned that positive thinking influences the way we are on the tennis court, it influences the way we are in life. Thanks to your inspiring work I have taken big steps in taking control of my thoughts, emotions and my behaviour. I received the tools to realise my goals and dreams. I am motivated to become the BEST version of myself.
Nicole van Zuilen
Member of Weesper Tennis Club

Welcome to my website! My name is Bastiaan Kollen, and I’m thrilled that you’ve stopped by. As someone who still enjoys the game of tennis every day, as well as life, I know firsthand the power of sports and living life to the fullest. Our time on this earth is a precious gift, and it’s up to us to make the most of it. That’s why I’m dedicated to helping others unlock their true potential and achieve their wildest dreams. Whether you’re looking to improve your game on the court or simply seeking to live a more fulfilling and meaningful life, I’m here to support you. I’ve experienced my own share of challenges, from mental health issues to physical ailments, and I know the value of taking care of our bodies and our minds. So, let’s make every moment count! Whether you decide to join me for a coaching session, workshop, or simply follow along online, know that you are capable of achieving great things. Dream wild, live passionately, and let’s make magic happen together!

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