* U.S. sports tycoon and Qatar want 35.5 percent of Formula One
* Looking to acquire CVC's controlling stake
* F1 chief says there are several potential bidders (Adds Breakingviews link)
By Freya Berry
LONDON, June 24 (Reuters) - The owner of the Miami Dolphins football team is joining forces with Qatar to buy a controlling stake in Formula One in a deal that could be worth up to $8 billion and inject new leadership into a sport facing falling TV audiences and ticket sales.
Dolphins owner Stephen Ross is looking to acquire a 35.