There were some attempts before, but that was only an one time effort...
http://tennisplanet.wordpress.com/2...2010/06/20/chess-elo-rating-system-adapted-to-men’s-tennis-from-rafafan-thanks/
At that time, ranking of players was (top 10, at least):
1 Roger,Federer,SUI 2007.7 2890.2
2 John,McEnroe,USA 1985.3 2835.6
3 Ivan,Lendl,USA 1990.1 2814.3
4 Rafael,Nadal,ESP 2009.4 2799.6
5 Bjorn,Borg,SWE 1980.5 2771.4
6 Jimmy,Connors,USA 1980.1 2665.1
7 Novak,Djokovic,SRB 2009.9 2619.4
8 Pete,Sampras,USA 1997.2 2609.6
9 Andy,Murray,GBR 2010.1 2584.2
10 Rod,Laver,AUS 1975.2 2567.8
...
The first number is year.month when the peak points were achieved, the second is the actual peak rating points.
Compared to chess players:
1. Kasparov, Gary……………… g RUS 2851 2851
2. Anand, Viswanathan………….. g IND 2771 2769
3. Kramnik, Vladimir…………… g RUS 2760 2758
4. Shirov, Alexei……………… g ESP 2734 2751
5. Morozevich, Alexander……….. g RUS 2758 2748
6. Leko, Peter………………… g HUN 2701 2725
7. Adams, Michael……………… g ENG 2708 2715
8. Ivanchuk, Vassily…………… g UKR 2702 2709
9. Bareev, Evgeny……………… g RUS 2698 2709
10. Topalov, Veselin……………. g BUL 2690 2702