At the same time he started working with young tennis players in the national tennis centre in Zagreb. He achieved his first greater result in tennis with tennis player Mervana Jugic-Salkic (2002-2004) when he and her team helped her make the Top 100 tennis players in the world, going from No. 470 to No. 99 in WTA rankings list. Slaven Hrvoj achieved similar success with Roko Karanusic who climbed from No. 180 to No. 88 in the ATP world rankings list during their co-operation (2005-2009). In 2007 Slaven Hrvoj began working with two other great tennis professionals, Jelena Kostanic Tosic and Antonio Veic.
During those 13 years of working and travelling with tennis players he gained major tournament experience in tournaments of all categories, from ITF junior tournaments to professional ATP and WTA tournaments and Grand Slams. Considering the fact that tennis players spend almost the entire year (10.5 months) in tournaments, that experience helped him greatly to understand the demands of professional tennis better and develop a system of physical preparation that enables physical progress of players throughout the entire season.
In 2010 he was invited to share some of his training methods at the international congress of physical conditioning coaches. The event was organised at the Faculty of Kinesiology in Zagreb by the European Physical Conditioning Association (link).
In 2014 he was named Honorary Coach / Lecturer by the Faculty of Kinesiology, University of Zagreb.
In February 2015, UKTH (Croatian Strength and Conditioning Association) named him Best Strength and Conditioning Coach for 2014.
Today he is in charge of physical preparation of top Croatian tennis players, Marin Cilic, Ivo Karlovic, Antonio Veic, Toni Androic and very promising young player Ana Konjuh.
13 years of working as a strength and conditioning coach, 2 years in basketball (first division), 12 years in tennis
Attended (as a conditioning coach) more than 100 professional tennis tournaments (ATP, WTA, Grand Slams), more than 60 ITF Tournaments (mens, womens, juniors) and Olympic Games in London
TOP 100 PLAYERS
Marin Cilic, best ranking No. 8 ATP
Ivo Karlovic, best ranking No. 14 ATP
Jelena Kostanic-Tosic, best ranking No. 32 WTA
Roko Karanusic, best ranking No. 88 ATP
Mervana Jugic-Salkic, best ranking No. 99 WTA
Ana Konjuh (still junior), best ranking No. 55 WTA, best junior ranking No. 1
1 Grand Slam Singles Title (Marin Cilic, US open 2014)
9 ATP Tournament Singles Titles
1 WTA Singles Title
6 ATP Challenger Singles Titles
13 ITF Mens Tournament Singles Titles
4 ITF Womens Tournament Singles Titles
2 Junior Grand Slam Singles Titles (13 ITF Junior Singles Titles in total)