The 25-year old Portuguese defender is on a season-long loan with the Spanish club after only joining the Royals from Sporting Lisbon in January 2013.
Carrico has impressed for the Sevillistas, who are sitting fifth on Spain's La Liga table, and could make a less temporary shift to the Ramon Sanchez Pizjuan this summer according to Hammond.
"I'm pleased because he's a fantastic boy and he's gone there and played very well. He's a very well respected player in their group.
"Sevilla have an option to buy. He's done very well, so the assumption would be that they will take that option up."
He added: "I think the key is he's playing week in, week out.
"Daniel is a player with a really good CV, but when we took him in the January he hadn't got games under his belt. He was not up to speed.
"Now he's gone to Spain and he's done very well. It's probably been easier for him in terms of the pace of the game, and the position that he's played has allowed him to build a volume of games.
"But if you come into the Premier League, like he did, it can be quite a culture shock, as many have found."
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