This achievement is best combined with the end career with 1000 points one as while youre getting 1000 points you will inevitably be world number one.
In your first season aim to win all the minors and possibly a major or two, concentrate on training and max out power,forehand, backhand, speed and precision. In your second season continue to train and distribute the stars as desired (serve, stamina and reflexes id recommend personally) but aim to win all the majors and any "special" matches such as the tennis academy naming one etc, this will give you silver and gold stars.
When you max out 60 bronze stars you will get an invitation from a billionaire to a private match, its vs your rival and winning it is almost essential to maxing out all your stars in gold. By the end of your second season or beginning of your third you should have all gold stars and be well prepared to compete in slams and masters. Keep entering and winning minors and majors as well as the slams and masters.
If youre losing a match or training session quit to dashboard BEFORE the game can autosave.
This should pop in your third season if you win at least 3 masters and 2 slams, if not just keep entering and winning tournaments and it will be yours eventually.