NOT AGAIN!!!
For the second time in a month, Novak Djokovic hit a tennis ball right into a line judge!!!
This time, it was a true accident -- Novak was trying to return a serve when he lunged at the ball ... and re-directed it right at a judge's face!!!
It all went down Monday at the French Open -- Novak was battling Russian tennis player Karen Khachanov.
The good news ... unlike the incident at the U.S. Open, the line judge was uninjured this time!
Also, unlike the U.