After landing Mido, Middlesbrough are set to sign two more Egypt internationals in Al-Ahly pair Mohammed Shawky and Emad Moteab.
Al-Ahly sporting director Hossam El Badary said: "The two players will be with Middlesbrough next week for observation after we reached a deal with the English side.
"We have received several bids for these two players, in particular from European clubs, but Middlesbrough's offer was the most lucrative.
"We have had a long and tortuous negotiation before we agreed to release them because we don't want them to go through any exhaustive trials as they are world-class players.
"If the players are successful in the observation and medicals we should close the deal before the close of the transfer window."