Пост в Ataşehir, Istanbul Province, Republic of Türkiye

Manchester United play Manchester City on Saturday, and I was wondering where I might be able to stay after or before the match, to enjoy a long soak in a bathtub and/or have a relaxing shower (in a cubicle that is bigger than a telephone box) in Istanbul?

I would be grateful to hear any suggestions as to the best places to stay in Istanbul with the biggest bathrooms!

Thank you everyone