Borzoi are used in Russia, Eastern Europe and Central Asia, for hunting hare, fox, wolf, etc. But they are a VERY different dog to the show dogs you see here. They are also used in Staghound breeding in the U.S. and Australia, but, once again, they are NOT the show types we see here. On wide open land, against certain quarry, they have their place; but here, there are better crosses; Deerhound, Saluki, for example. 
  
Cheers.