PTCA - Professional Tennis Coaches Association - Mats Merkel Kings of Tennis Stockholm March 2016 Photo: David Johansson | Facebook
![Tennis - French Open - Roland Garros, Paris, France - 25/5/11 Great Britain's Andy Murray (L) with Germany's Mats Merkel during practice Mandatory Credit: Action Images / Jason Cairnduff Livepic Stock Photo - Alamy Tennis - French Open - Roland Garros, Paris, France - 25/5/11 Great Britain's Andy Murray (L) with Germany's Mats Merkel during practice Mandatory Credit: Action Images / Jason Cairnduff Livepic Stock Photo - Alamy](https://c8.alamy.com/comp/2ECHJYP/tennis-french-open-roland-garros-paris-france-25511-great-britains-andy-murray-l-with-germanys-mats-merkel-during-practice-mandatory-credit-action-images-jason-cairnduff-livepic-2ECHJYP.jpg)
Tennis - French Open - Roland Garros, Paris, France - 25/5/11 Great Britain's Andy Murray (L) with Germany's Mats Merkel during practice Mandatory Credit: Action Images / Jason Cairnduff Livepic Stock Photo - Alamy
![Three of the four Grand Slams will be won by either Djokovic or Nadal, says tennis consultant and former coach Mats Merkel » FirstSportz Three of the four Grand Slams will be won by either Djokovic or Nadal, says tennis consultant and former coach Mats Merkel » FirstSportz](https://firstsportz.com/wp-content/uploads/2020/12/WhatsApp-Image-2020-12-28-at-2.13.33-PM-1-696x392.jpeg)