There is a sort of "closed circle" in that.
Musk founded the most "Russian" (technological speaking) of the American space companies, and now Russians chase after him.
If you look closely to Falcon 9 features and technologies, you can easily read between the lines some Russian ancestors:
1. RP1/LOX engines
2. Grid fins
3. Orizzontal assembly (Russian) vs vertical assembly (American)
4. Short turnaround on the pad
5. Heavily automated spacecraft (astronaut like passenger, typical Russian) vs heavily piloted spacecraft (astronaut like space jockey, typical American)
6. Powered capsule landing (originally envisioned for Dragon 2, conceptually derived by Zarya KK of late 80's)
What else?