The tennis courts at Glen Canyon Park are part of an increasing citywide online reservation system. SF Rec and Park has posted details:
Tennis, anyone? We’re pleased to announce that we’ve added 12 tennis complexes to our pilot tennis court online reservation system for tennis and pickleball play. The expansion allows people to reserve more courts citywide, while increasing the number of bookable lighted courts for night play. For more information and to reserve a court, click here.