Turn- und Sportgemeinschaft 1899 Hoffenheim e.V. ( pronounced [ˈtʊʁn ʔʊnt ˈʃpɔʁtɡəˌmaɪnʃaft ˌʔaxtseːnˈhʊndɐt ˌnɔʏnʔʊntˈnɔʏntsɪç ˈhɔfn̩haɪm] ), commonly known as TSG Hoffenheim ( pronounced [ˌteːʔɛsˈɡeː ˈhɔfn̩haɪm] ), are a German professional football club based in Sinsheim .