River Plate wonderkid Exequiel Palacios will complete a €25 million (£22.3m/$28.4m) switch to Real Madrid to be announced after the Copa Libertadores final, Goal understands.
The 20-year-old midfielder has won rave reviews in 2018 for his performances with the Millonario, who have battled through to the decisive stage of South America's premier club competition.
That form has caught the eye of Madrid, with preliminary talks taking place despite initial River anger when the Spanish giants' interest went public without the consent of those in charge at the Monumental.
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And while silence reigns on both sides of the negotiating table, no official statement will be made until the dust settles on Saturday's final second leg against arch-rivals Boca Juniors, with the tie poised at 2-2 after the opener.