I agree we're not as good as we used to be. Our tennis players aren't as good as they used to be [with Philippoussis, Rafter, Cash, etc] but there's some promising guys coming through, notably Kyrgios, and Kokkinakis is promising too. The swimmers aren't as good either when Ian Thorpe was going around. Or the cricket team when we had one of the strongest teams ever with Warne, McGrath, Ponting, Hayden, Langer, etc. etc.
What about Russian sport, by the way? I read a thread on this tennis forum I go to called "the death of Russian tennis" and the thread author was obviously concerned about the future of tennis in Russia -
Looks at the rankings and players' ages
4 Maria Sharapova 27y
15 Ekaterina Makarova 26y
23 Svetlana Kuznetsova 29y
26 Anastasia Pavlyuchenkova 23y
52 Elena Vesnina 28y
103 Alla Kudryavtseva 26y
107 Alisa Kleybanova 25y
133 Alexandra Panova 25y
136 Ksenia Pervak 23y
154 Marta Sirotkina 23y
156 Maria Kirilenko 27y
162 Ekaterina Bychkova 29y
171Vitalia Diatchenko 24y
The lack of young players is apparent. Another problem is many Russians playing for another country. This trend may continue in the future unless Russian Tennis Federation does something about it. Moreover, some of the youngers prospects like Khromacheva and Kan have disappointed so far.
And on the men's side, highest ranked Youzhny is 32, Tursunov is 31, Davydenko is ranked 120...