The club officials are on the way to England with the goal of extracting more money from the Reds, but Coates is expected to sign a deal imminently to join compatriot Luis Suarez
EFE reports that directors Hector Olmos and Alex Saul left for England on Monday to continue negotiations with Kenny Dalglish's team. Nacional hope to seal a small raise in the already-agreed fee of £7.6 million, to compensate the side for bigger offers rejected by Coates due to his desire to join the English club.
The officials are due to arrive in England on Monday evening, and it is estimated that a contract of undisclosed length will be signed between by Tuesday. It was hoped that the deal would be concreted earlier, but as Saul revealed a missed flight in Lisbon delayed their arrival.
"We are in Lisbon, en route to Manchester. We are going to arrive 10 hours late, about six in the afternoon in Uruguay [22:00 BST]. We should have been there a while ago, but the negotiations will be done tonight," the club's contracts director admitted in an interview with Radio 1010.
"I get the feeling that the normal paths of communication have not been maintained. We are going to negotiate and I believe that we are going to take a bit more money."
The young defender, a Copa America winner in July with Uruguay, arrived in the country on Friday, and on Saturday afternoon he could be seen in the Anfield directors' box witnessing Liverpool's 3-1 victory over Bolton.