The Growing Tennis Chain of 2010 or the Growing Poop Tennis CHALLENGE was a tennis chain where the number of seconds of each round was the same as its round number. In a way, this makes it inherently a rudimentary chain version of Additive Time Tennis.

Originally hosted by Pikalax1 on August 25, 2010, the match continued slow but steady for 27 rounds until around April of 2013, when then-staff AshcrementVII locked the original thread. ^[1] Two further "unofficial" rounds were created; one by Gabrielpika in 2014 and another by aw8qn in 2022. aw8qn's round 29 is where the match stands today, well short of the 15 minute goal originally proposed.

The rules of the match according to Pikalax1 were as follows:

"Each round can be no more than one second (30 frames) longer than the previous round.
The amount of the previous round that gets rendered into the next round should be at least 75% (3/4).
At least one new visual or audio source must be added in each round.
This match will end when we reach 15 minutes, or when we feel like cutting it off.
There is no limit to the number of people who can participate, but there are to be no lateral branches.
Each new round must be listed as a response to the previous video.
The video must also be posted in the thread on YouChew (link above)."^[2]

The match's order was relatively stable up until round 23 was released by Pikalax1 in July of 2011^[3]. The initial player list afterward was listed as:

24. CaptainStringCheese
25. SergeantBacon
26. JackTron7000
27. Ad4ptX
28. IceSumo
29. TheFXexpert
30. Luioigi
31. vel 17
32. IceSumo

However following many player retirements as well as computer troubles from CaptainStringCheese^[4], this order changed dramatically with only vel 17 actually making their round, now moved to round 25.

Full Match

Growing Tennis Chain (2010)
	Additive Time Tennis, Chain
Start Date	August 25, 2010
End Date	May 21, 2022
Rounds	29
Participants	Pikalax1, Thatco, magmalord, SuperKoffee, CorruptionSound, Funacceptable, SergeantBacon, trepmaws, Sploltoen, DoomZappo, GameBop, Metroid998, vel 17, ChrisGendo, Moogle, Luioigi, TheChutley, MycroProcessor, AshcrementVII, djninjalovemistake, dani_phantump, Gabrielpika, aw8qn
Match Page	link