To dream that you are playing sports with others suggests that you have great teamwork and willingness to let others be part of your team. You want to improve your skills and the sport with others which shows that you have good communication and camaraderie.
On the other hand, this dream can serve as a nagging reminder for you to improve your relationships and comradeship with others. This may have resulted from you taking the sport too seriously and too competitive. Try loosening up to help improve the flow of communication among you and others.