Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.

• 41819c01 Sports Field Section 8 x 16 with Horizontal Slot and Black Sliding Holder [Complete Assembly] Alternate of this part
• 41819 Sports Field Section 8 x 16 with Horizontal Slot Sub-part of this part
• 41820 Minifig Stand Basketball, Sliding Holder Sub-part of this part