
Self-Managed
 GMTC Tennis Club is a growing grassroots tennis community based in Balikpapan, East Kalimantan, Indonesia. Founded in 2025, GMTC brings together tennis players, professionals, business owners and community members through regular tennis drills, match play, private sessions, tournaments and social activities. GMTC focuses on building an active and connected tennis community, combining sport, lifestyle, networking and meaningful relationships beyond the court. Our community welcomes players across different experience levels, from beginners to more competitive players. We organize regular community sessions and internal competitions, while creating opportunities for brands to engage directly with an active and affluent local audience through event activation, product placement, branded content, community engagement and digital exposure. Our current community footprint includes 98 registered members, 45 active members and more than 900 player attendances across our tennis activities. GMTC is based in Balikpapan with ambitions to expand its community network across East Kalimantan and beyond.
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Brands can sponsor GMTC on OpenSponsorship by creating a free account, browsing GMTC's profile, and sending a sponsorship proposal for social posts, appearances, or integrated campaigns. OpenSponsorship handles messaging, deliverables, and deal terms in one platform so you can connect directly with this team.
GMTC is listed on OpenSponsorship and available for brand sponsorships. Brands can review campaign packages, audience details, and pricing on this profile, then submit a proposal to start a partnership with this team.
According to OpenSponsorship, GMTC's audience includes based in Balikpapan, East Kalimantan, Indonesia. Brands can use this profile to evaluate reach, content niche, and sponsorship fit before sending a proposal.

Genisys Credit Union, headquartered in Auburn Hills, Michigan, has done something most brands never do with athlete sponsorship: it kept renewing. What started as a single partnership with Detroit Lions tight end Sam LaPorta has become a multi-year, two-athlete program that Genisys has renewed and expanded every season since 2024, adding Lions wide receiver Isaac TeSlaa in 2025 and renewing him again in 2026.
October 6, 2026