Roger started off with his professional development stage with a record of emerging victorious in three consecutive tournaments in Marseille and Dubai. He again won the matches at Munich, but also had to get defeated in the first rounds of the French Open.

He was the first ever Swiss male player to win a Grand Slam Title which was also his very first title at Wimbledon after defeating Mark Philippoussis in July 2003. He then further achieved the victory at four Davis Cup matches and led his country Switzerland to the semifinals of the World Group.

He then won the Tennis Masters Cup at the end of 2003 in Houston, and ranked second if the ATP Champions Race just lagging behind Andy Roddick, who is famous American player.

In the year 2003 he also took a major decision of breaking his association with his coach Peter Lundgren who was with him for four years.

The year 2004 is considered to be one of the most successful and developing years in the life of Roger, even in his tennis career. The major breakthrough came up when he won every single final match he reached and is also held the honor of winning three of the four Grand Slam tournaments.

Roger still did not have the Australian Open matches in his winning books, but in the year 2004 he defeated Marat Safin and won the Australian Open title as well, raising him to the standard of number 1 worldwide tennis player, replacing the great American player Andy Roddick, this honor is still maintained by Roger till date.

Roger then captured the title of Wimbledon and also the U.S Open title defeating Andy Roddick and Lleyton Hewitt respectively. He went on to the finals of the Tennis Masters Cup at Houston where he won over Hewitt for two consecutive years altogether.

He had a record in the year winning 11 titles and the win-loss statistics of 44-6 which is a major achievement in itself. He was awarded various titles on his breakthrough achievements in the same year like the ITF Tennis World Champion and also the Laureus World Sportsman of the year in the year 2005.

With such an exemplary year and achievements Roger replaced some of the all time favorites like Michael Phelps, Michael Schumacher, Valentino Rossi, and Lance Armstrong.

The interesting thing about the year 2004 is that with all the achievements and success he was in fact without any coach that year. He was completely relying on his physiotherapist Pavel Kovac, his fitness trainer Pierre Paganini, and also a group of management which consisted of his family members including his Parents, his girl friend Mirka Vavrinec who was also his manager in the group, together with a few more friends.

He then appointed a coach for the practice of the year 2005, who was a very well known Australian Tennis Player Tony Roche. This association though was only supposed to be on a limited basis.

With the year 2004 his developing stage reached to an end as he had reached already the pinnacle of his professional tennis excellence.

Roger did not have an entirely remarkable 2005 start, as though he reached the semifinals of the Australian Open, lost over the winner of the title Marat Safin, the show actually was a tough match which lasted for a four hour period and Roger gave him a tough time throughout, in which finally the opposition won at the edge.