Most successful opening partnerships

List of most prolific opening partnerships by number of double-century stands in Test cricket. 

4 - Gordon Greenidge/Desmond Haynes (West Indies) 
4 - Matthew Hayden/Justin Langer (Australia)
3 - Mark Taylor/Michael Slater (Australia) 
3 - Bill Lawry/Bob Simpson (Australia) 
3 - Mike Atherton/Graham Gooch (England)