Form even teams. Make a line for each spanning the entire length of the court. Have stations on just the transverse lines (easier), or add additional stations as per diagram to really increase the fitness requirement.
Players must sprint to the first cone (1), touch it, and sprint back to the starting cone on the baseline. All players in the team repeat this.
Each subsequent turn, increase the number of cones players must touch by 1. Players sprint to each station in order and back, e.g, cone (1), return, cone (2), return
Continue until players complete the entire course by touching every cone and returning.
Optionally have a 'fun' penalty for the losing side
