# Marcin Kosakowski > Marcin Kosakowski is a Tennis coach in Marina del Rey, California. Source: https://sites.coach/marcin-kosakowski. Every page on this site has a Markdown version at its URL plus `/index.md`, or send `Accept: text/markdown`. ## About - Headline: Tennis lessons with Marcin - Teaches: Kids, Teenagers, Adults, Seniors - Levels: beginner, intermediate, expert - Years of experience: 22 - Lessons taught: 222+ - Rating: 5.0 out of 5 from 119 ratings 6.0 ranked pro with Division 1 experience at UC Santa Barbara. Former ATP and WTA coach. Coaching players of all ages and skills since 2005. Let's elevate your game together! ## Packages and prices - **Lesson Package**: 4 prepaid 60-minute lessons for $180.00 ($45.00 per lesson). Sold as 1 to 20 lessons. ## Where lessons happen - Glen Alla Park Tennis Courts, Marina del Rey, California - Del Aire Park Tennis Courts, Del Aire, California ## Weekly hours - Monday: 6:30 AM to 8:00 PM - Tuesday, Wednesday, Thursday, Saturday, Sunday: 8:00 AM to 8:00 PM - Friday: 6:00 AM to 8:00 PM ## Cancellation policy - Cancel or reschedule at least 24 hours before a lesson. The coach charges no fee for a late cancellation or a no-show. ## Reviews > The lesson with Marcin was quite good. I felt like my overall game definitely improved, especially in rally consistency. Though I’d say the pace was steady, which suited me well, the focus on positioning and shot selection was particularly helpful. Still, I hope future lessons might include more specific drills to sharpen certain strokes further. If you're after a measured approach, I think Marcin's lessons are worth trying out. > From Chiaju, 5 out of 5 > I feel like I’m making a lot of progress, and Marcin organizes the class very well. The lessons are structured and easy to follow, which makes learning enjoyable. If you want to improve your tennis skills in a well-planned setting, I definitely recommend trying Marcin’s lessons. Looking forward to continuing with the same great approach! 🎾 > From Stefany, 5 out of 5 > That lesson really pushed me, and I felt progress as I chased every shot. Making me run kept me honest, and I’m optimistic about all around improvement with Marcin. Definitely excited for the next lesson. > From Justin, 5 out of 5 > I had forgotten how much fun tennis was with. Teacher! Marcin is kind lovely east to get along with and patient I would recommend him for anyone. > From Amanda, 5 out of 5 > First lesson went great! The instructor is very knowledgeable, and helpful especially as a beginner trying to understand tennis more. > From Perla, 5 out of 5 > If you're after a coach who’s attentive to detail but relaxed about it, Marcin’s worth trying. > From Chris, 5 out of 5 > Marcin was awesome! Couldn’t have asked for more on our first lesson > From Giovanni, 5 out of 5 > I wish I had met Marcin earlier. I might have been a professional. > From Rebecca, 5 out of 5 ## Pages on this site - [Home](https://sites.coach/marcin-kosakowski/index.md) - [All services](https://sites.coach/marcin-kosakowski/services/index.md) - [Tennis Lessons](https://sites.coach/marcin-kosakowski/lessons) - [Private Lessons](https://sites.coach/marcin-kosakowski/private-lessons/index.md) - [Lessons in Del Aire](https://sites.coach/marcin-kosakowski/areas/del-aire) - [Lessons in Marina del Rey](https://sites.coach/marcin-kosakowski/areas/marina-del-rey) - [Del Aire Park Tennis Courts, Del Aire](https://sites.coach/marcin-kosakowski/locations/del-aire-park-tennis-courts-del-aire) - [Glen Alla Park Tennis Courts, Marina del Rey](https://sites.coach/marcin-kosakowski/locations/glen-alla-park-tennis-courts-marina-del-rey) - [Agent instructions](https://sites.coach/marcin-kosakowski/llms.txt) ## Book through the API Marcin Kosakowski sells Tennis lessons on this site. It is one coach on TeachMe.To, listing id `a781e402-74d3-402d-8942-406ee4053256`. An agent reads this coach, quotes what this site sells, and books it through the TeachMe.To agent API. - [Agent instructions, generated from the live API](https://api.teachme.to/agent/v1/llms.txt): Read this before calling anything. Sessions need no registration. - [This coach](https://api.teachme.to/agent/v1/coaches/a781e402-74d3-402d-8942-406ee4053256): The coach read. `site.packages` are the packages sold here, priced as this site prices them, and `site.cancellationPolicy` is this site's policy. - [Open times](https://api.teachme.to/agent/v1/coaches/a781e402-74d3-402d-8942-406ee4053256/slots): Pass `sitePackageId` and `locationId` with `from` and `to`. - Quotes and bookings: pass `sitePackageId` and `lessons` to `POST /quotes`, then `POST /bookings` with the quote. The booking returns `paymentUrl`; the student pays there, and the booking is readable while they do. Send `policyAccepted: true` after showing the student the policy when `site.cancellationPolicy.agreementRequired` is true. - [OpenAPI 3.1](https://api.teachme.to/agent/v1/openapi.json): The machine contract. The `sitePackageId` and `locationId` values for this site are in [llms.txt](https://sites.coach/marcin-kosakowski/llms.txt).