In the next two years , his playing success again gained the right to challenge Petrosian .
Spassky lost the match with 3 wins against Petrosian 's 4 wins , with the two sharing 17 draws .
In the next two years , Spassky 's playing success again gained the right to Petrosian Petrosian .
Spassky lost the match with 3 wins against Petrosian 's 4 wins , with the two sharing 17 draws .