Playing tennis on a windy day creates a number of difficulties. You can't stop the wind, but you can overcome some of the resulting problems.
1. Sunglasses or regular glasses can help keep dust out of your eyes. It's not a sure thing, but it may work. As for pollen—not much you can do. Finally, Hats and visors can blow off and interfere with the game. Be careful.
2. When the wind is at your back, hit the ball low. And use topspin to make your shots sink. If you haven't learned topspin by now, you have no recourse other than to hit soft balls and watch them get hammered.
3. When the wind is in your face, follow through on every shot. What works as a deep baseline shot on calm day, may land five feet inside the baseline against the wind—an easy shot for your opponent to put away.
4. You can still use lobs on a windy day, but with the wind at your back they need to be topspin lobs or they will sail, and sail, and sail....
5. You can't toss the ball lower on your serve without changing the effectiveness of your swing. Try to adjust during warmups—get a feel for how much your toss will drift and play accordingly. In a particularly strong gust, wait a few seconds until the air calms down a little.
5. Watch for balls on the court. As soon as you see a ball from another match roll onto your court, yell LET. Tennis is not a dangerous game until you turn it in to an obstacle course dancing around balls. Yell LET and replay the serve. If it's the second serve, replay the second serve only. Don't restart the point.