Professional Stringer

During the course of our career we have been members of the Official Stringing Team at 29 Grand Slams having strung a total 57 ATP/WTA/ITF tournaments including the Olympics in 2004. We are USRSA MRT and one of the 11 elite ERSA MASTER Pro Tour Stringer worldwide.

Supporting the Champions

Having spend more than 20 years in pro tour stringing and 57 events including the Wimbledon Championships, Roland Garros, Indian Wells, Pacific Life Open, Olympic Games, Challenger events and Davis Cup, we set the highest standards of stringing and customization to your racket.

Professional Coach

With this blend of a successful high performance tennis coaching career of nearly 2 decades counting around 650 titles and an incredible expertise in racket service we believe we can influent your game the best possible way.

racket specialist

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Pro Tour Stringer – Customizer

Nearly 20 years of pro tour stringing experience and more than 50 professional events.

29 Grand Slams, Olympic Games 2004, 2 Master Series, 10 Challenger, 4 Davis Cup, 12 ITF events

  • Wimbledon Championships from 1997 to 2017
  • Roland Garros 1998, 2000, 2001, 2002, 2003, 2004, 2005, 2011
  • Olympic Games 2004 and Test Event 2004
  • Indian Wells 2001 and Pacific Life Open ATP Master Series 2003
  • Official Stringing Service at the Athens Champions Cup 2007 Outback Series, starring Pete Sampras, Jim Courier, Pat Cash, Wayne Ferreira, Magnus Larsson, Richard Krajicek, Todd Martin, Anders Jarryd
  • Official Stringing Service at the $125.000 Athens Status Open Challenger in 2008, 2009, 2010, 2011, 2012
  • Official Stringing Service at the $125.000 Aegean Tennis Cup Challenger 2009


  • Official Stringing Service at the $85.00+H Ixian Grand Aegean Tennis Cup Challenger 2010
  • Official Stringing Service at $125.000 ITF Vogue Athens Open 2008, 2009
  • TEB BNP Paribas $250.000 Istanbul Open 2015
  • Davis Cup Greece vs Norway, 2000
  • Davis Cup Greece vs Armenia, 2001
  • Davis Cup Greece vs Denmark, 2001
  • Davis Cup Greece vs Ireland, 2003
  • Galea Cup under 19, 1998
  • Official Stringing Service at eleven $10.000 Women’s Futures 1998, 1999, 2001 to 2009
  • Olympus Open 2016 – ITF WheelChair Tennis Tour
  • Men & Women Greek National Championships, 1998

High Performance Tennis Coach

2 decades of successful career counting more than 650 titles

  • Envisioned, designed the detailed layout and construction plans of the Nea Ionia Tennis Club, Volos Magnesia in 1995.
  • Supervised the construction of the club from 1995 to 1999.
  • Tennis manager and head coach at the Nea Ionia Tennis Club from 1999 to 2010 have teached tennis to more than 2500 adults and kids of all ages to date.
  • Head coach at Magnesia Tennis Club 1997 to 2010 have more than 650 titles in regional, national and international tennis events.
  • Coached 2 Balkanian champions, several national champions both in singles and doubles.
  • Coached for 1 year the ETA No2 U18 Zacharias Katsigiannakis leading to 5th place (quarterfinalist) at the Boys Singles European Championships 2004 and 2 more international titles.
  • Have achieved with Magnesia’s Tennis Club players to unofficially entitled most winning team at one National tournament, to the National Championships and to the Masters Event with the 8 best national players.
  • Have reference from Paul Xanthos (tennis coach of Los Angeles Pierce College, USPTA Coach of the Year 1994 and honored as one of the 10 best tennis coaches in USPTA)

Clients & Testimonials

Glad to hear from you all!

  • I had doubts about the correct size of my grip. After we discussed with mr. Petros we decided that it had to be reduced in size so that it fits better in my palm. With an unprecedented stringing quality and his advise in choosing the correct tension, the outcome was a perfect ball feedback during impact while at the same time power kept at optimal level. My service also improved drastically after the grip customization and the racket wasn’t tiring my muscles any more. From now I will never let anyone else “put his hands on my racket” so that I will always get the most delight out of my game. I thank him very much and totally recommend him. (translation: respecting the original)


    Renos Chamilothoris
    Πτυχιούχος των ΤΕΦΑΑ
  • After 2 unsuccessful and costly racket purchases, that proved not to fit my game style, I found out about Petros Biris and Mantis. In the beginning I was hesitant, but after I spoke with Petros I had answers to all my questions and step by step we found the Mantis frame that works best for me (Mantis 265). His stringing is “out of this world”, a sweet feel that is hard to believe, every stroke felt fantastic, the racket become a continuity of my hand. But it wasn’t just that. Petros follows my progress by adjusting the racket to my game development. Customization is what makes the difference, as the racket truly becomes a very personal thing. (translation: respecting the original)

    Elena Kontopidi
    Club player, Naxos island
  • Following Petros Biris’ recommendation I switched my racket from Prince to Mantis and I’m glad that I did it.  I’ve just played twice and I can tell and feel the difference.  Petros undertook the racket stringing.  The overall service met my expectations in addition to time-response and the cost.

    Sissi Kourelou
    Club player, Athens
  • Continuing my career as a humble player in a sport that I recently fall in love with, I switched from MANTIS 285 to MANTIS 295. What I want to say about the work of Mr. Biris is that his advice and attention in order to set up my racket, were beyond my expectations and well beyond the limits of “just being” professional. I highly recommend his service !!!! Thanx Petros!

    Konstantinos Bogas
    Club player, Athens
  • No matter what I say to describe what this man does with the rackets, it still would be not enough… Great job! He gave life to all my “dead” rackets. Show full confidence and let your racket in his hands. You won’t regret it…  (translation: respecting the original)

    Νikolaos Αlexandrinos
    Club player, Crete island
  • From our very first telephone conversation, Mr. Biris heard our concerns about the racket of our child, giving great attention to details. We immediately realized his excellent knowledge and expertise in the field. Our kid was thrilled by the new feel of the grip and the difference in both control and power was noticeable from the very first strokes. It wasn’t just the stringing, but the fact that he still advises us and gives us guidelines transforming the racket to an extension of our kid’s hand and helping him to further develop as a player!  (translation: respecting the original)

    Sofia Kalogeraki
    Parent of junior player, Athens

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