Erdogan questioned "Can you speak of human rights" in the EU when the bloc's leaders agreed to be hosted by el-Sisi. He was referring to a summit between EU and Arab League leaders held in Sharm el-Sheikh this week.
The nine were convicted of involvement in the 2015 assassination of the country's top prosecutor. Ties between Egypt and Turkey have been tense since the 2013 ouster of Islamist president Mohamed Morsi. Egypt accuses Turkey of becoming a refuge for Muslim Brotherhood members who fled Egypt.