Ramos did not seem interested in the large salary offer from Al-Ittihad, he preferred Sevilla as a club at the start of his professional career. Ramos still has the opportunity to play in the top league even though he is 37 years old. Sevilla is also one of the clubs competing in the UCL this season.
Sergio Ramos is known for making records with his attitude and red cards. I could imagine being carded from Saudi Arabia altogether if he play there 
As a free agent, he didn't receive an offer from Inter Miami, a Turkish team was looking for him too and offered €11m a year but he refused. He didn't care also about Al-Ittihad offer of €20m a year and preferred to join Sevilla which only can afford €1m which he accepted. Normally after medical visit he will be a Sevilla defender again after 18 years from his departure there.
Sergio Ramos is making a return to Sevilla, after a long 18 years he left the club. It's definitely a great decision. He truly epitomizes a successful career because he arrived, he achieved, he conquered, and now he wants to give back to where it all started. I'm really looking forward to seeing him in Sevilla colors again and winning the love and support of the fans.
I am really wondering what the reason is why he goes back to Sevilla. I don't really care because I also don't think that he will make much of a difference, although I get the point that he can now play the Champions League again, which must be a pretty cool side effect when he goes home to the club where everything began.
What I could hardly believe is that he couldn't find an agreement with a club from Saudi Arabia, but how is that even possible as a free agent? Usually they would just put up a ton of cash and the player signs the contract, period. But it is said that he wanted a three years contract and he was only offered a two years contract. That is quite weird because they would definitely sign him for whatever terms he wanted given that they literally sign everyone who has ever had a big name in a big league.
But maybe he didn't really want to go there, that's also an option. Will be fun to watch them play against Real Madrid in La Liga. Let's see if he tackles his old buddies the same way and receives a red card.