The patriarchal succession was not disputed until the Council of Chalcedon in 451, after which point there were rival Melkite and non-Chalcedonian claimants to the see, now known as the Greek Orthodox Patriarch of Antioch and the Syriac Orthodox Patriarch of Antioch, respectively.
There were rival Melkite and non-Chalcedonian claimants to the see known as the Greek Orthodox Patriarch of Antioch and the Syriac Orthodox Patriarch of Antioch. This was after which point. This was respectively. This was now. This was what the patriarchal succession was not disputed until the Council of Chalcedon in 451.