Not sure, but a pick would help. Even if you get the same species of wood, I think that getting an exact match will be a bitch (been there). Some true wood guys can get a seamless match, but even for the pros that is tricky.
You might want to replace a section with natural “break lines” like a corner or where theres a seam, or maybe curtains hang down.
Even if you section it, you may want clean and redo the teak to help blend.
If done right, I think the repair will not be noticeable to everyone that comes on your boat, but if your like me, you'll always notice the difference, lmao.