When the ball is hit deep and in the corner of the court, the first instinct many players have is to run straight across the baseline to get to the ball. The problem with running straight across the baseline is that your weight is moving backward, not forward.
It’s better to go back at an angle to give yourself more space to catch the ball moving forward. When you get pulled to the corner, don’t let yourself get caught off the court. Instead of trying to hit a winner, hit a high, deep return to buy yourself time to get back into position.