United takes on Manawatu in a critical match at Carisbrook in Dunedin tomorrow afternoon.
If Otago wins, and Wellington loses or draws its match with Canterbury in Wellington on Sunday, then Otago will be through to the New Zealand Football Championship play-offs for the first time.
For defender Horner (27), who has played for Otago United since its inception, save for a couple of years off through injury and time overseas, the play-offs prospect makes all the twinges and strains from a long season hurt that little bit less.
"It is the last game of the season and when you've still got something to play for, that makes it a lot easier at training," Horner said.
"If we make the play-offs then that will be a bonus. We have exceeded most people's expectations already this season. The last couple of years have not worked out for us, so to be still in with a shout with one game to go is pretty satisfying."
The side's success this year was due to several factors, Horner said, but greater player depth was undoubtedly a big help.
Six players have been training in Christchurch throughout the season and joining up with the Otago side late in the week.
"It has worked out not too bad. But these guys are quality players and can fit into the side pretty easily. Plus, I think it has brought out the best in everyone. We have more depth in the side."
Horner said Otago was enjoying working with coach Malcolm Fleming, though he also thought highly of former United coach Terry Phelan.
"Terry is probably more technical and has got so much passion for the game.
"That sometimes frightened the guys a bit. People reacted differently to it.
"Personally, I really enjoyed it under Terry. Malcolm is probably more relaxed and for some of the young guys that helps.
"But winning of course helps a lot. That gives you confidence in your own ability."
