ˈæftɚ plˈeɪɪŋ ɪn θɹˈiː tˈɛst ɡˈeɪmz zwˈɪsɪɡ plˈeɪd hɪz tˈiːm deɪbjˈuː ɪnðə swˈɪs kˈʌp ɡˈeɪm ˌɔn sˈɛvəntˌiːn fˈɛbɹuːˌɛɹi tˈuː θˈaʊzənd tˈuː æz bˈɑːzəl wˈʌn wˈʌn zˈiəɹoʊ ɐɡˈɛnst kˈɑːləmbiɚ.
After playing in three test games Zwissig played his team debut in the Swiss Cup game on 17 February 2002 as Basel won 1–0 against Colombier.