Australia captain Steve Smith said England batsman Ben Stokes was "blatantly out" and he did not regret appealing for his dismissal in the one-day international at Lord's.
Stokes, who made 10, was given out after bowler Mitchell Starc's throw at the stumps hit him on the left hand.
"If you're out of your crease and put your hand up to stop the ball, it's out," said Smith after the 64-run win.
England captain Eoin Morgan said he would have withdrawn the appeal.
Stokes is the first England batsman - and sixth overall - to be dismissed obstructing the field in a one-day international.
Stokes left his crease after driving the ball back to Starc, who collected it in his follow-through and threw at the striker's end in an attempt to run him out.
However, Stokes stopped the ball with his hand as he turned and dived to regain his ground.
Smith chose not to withdraw Starc's appeal and, after on-field umpires Kumar Dharmesena and Tim Robinson referred the decision, television umpire Joel Wilson recommended that Stokes be given out.
