How many runs does Steve Smith need to surpass Joe Root on most runs in Test history list?

How many runs does Steve Smith need to surpass Joe Root on most runs in Test history list?

Steve Smith and Joe Root are currently in action in the ongoing Ashes series. Both of them are among the best batters to have ever featured in the longest format of the game. Root is currently the second-highest run-scorer in the history of Test cricket and is chasing Sachin Tendulkar's world record in this aspect. He is 2232 runs away from surpassing Sachin on the list. But how many runs does Steve Smith need to surpass Root? Among active playe…