Rayan struck a first goal for the Cherries to cancel out Morgan Rogers' opener for Villa.
He has achieved a lot of very good things as a manager. I always say, Unai is one of the best managers. Not just in the Premier League, he is one of the best managers overall," Iraola said.
“He is a good example for me. We know about Pep Guardiola, but Guardiola has always been in top teams. He has been winning all the time.
“I value him a lot, Unai, because he started in the third division. In the second division, he improved a little bit. He went up to the first division.
“He has tried different things in different countries. He has arrived in top clubs. He has won titles.
“There is a process there. We can learn a lot from his experience. I have seen Unai coaching Almeria. I have seen Unai coaching Sevilla. I have seen him coaching Villarreal. A lot of different-level teams.
“He has always done well. He has adapted. In that sense, he is a reference for a lot of coaches.”