There are only four duos since the NBA/ABA merger to average 20 points per game and 10 rebounds per game.
Tim Duncan (21.1 points, 11.9 rebounds) and David Robinson (21.6 points, 10.6 rebounds) in 1998, Ralph Sampson (22.1 points, 10.4 rebounds) and Hakeem Olajuwon (20.6 points, 11.9 rebounds) in 1985, Larry Johnson (22.1 points, 10.5 rebounds) and Alonzo Mourning (21 points, 10.3 rebounds) in 1993, and Charles Barkley (20 points, 12.8 rebounds) and Moses Malone (23.8 points, 11.8 rebounds) in 1986.
Now, in the 2018 season, a full 20 years after the last time this stat line has occurred, Anthony Davis (25.