Silva extended his current deal by one season after being loaned by Portuguese side Benfica with an option to buy for 15 million euros ($16.5 million, £10.6 million) last season.
And after a good season with ten goals scored in 45 games and four decisive passes in 2014-2015 for Monaco, Silva signed a one-year extension to his contract with the side that finished third last season.
Boschilia, 19, passed his medical on Monday after arriving from Sao Paulo in the Brazilian league and signed for five seasons for a reported nine million euros .