Former Swansea midfielder Jonjo Shelvey has spoken about how things went wrong for previous cult hero Michu at the club.
Shelvey, who is now with Newcastle United, was a teammate of Michu's when the Swans were in the Premier League.
Michu got 18 goals in his first campaign in the top flight of English football.
But he only got two goals the following season and ended up going to Napoli on loan before heading back to Spain.
"When I signed I think [Michu] was their sort of main guy, in terms of goals and that," Shelvey said on The Beautiful Game podcast.
"Then a week after I signed Wilfried Bony signed.
"I think personally that sort of knocked the stuffing out of him, because Wilfried came in on a big deal and as the main striker and after that it didn't really work out for Michu.
"I only played with him for about six or seven months, but you could tell his finishing was just ridiculous."
Shelvey also mentioned how Michu did not sleep much in his second season due to poor form.
"We had these bands to wear, for when you go to sleep," Shelvey continued.
"They monitor you to show how much you are sleeping.
"They put it all up on a screen in the canteen. We had a meeting, there were a few lads going to bed at like 12 and that, on one graph he showed that someone was sleeping for three hours a night, and it was Michu.
"He was coming in and his eyes were drowsy and puffy, it turned out he was just up playing PlayStation til like 4 o'clock in the morning.
"I don't know if had always been like that. He looked tired all the time, then he got a bad injury.
"I don't even know what he's doing now, he sort of disappeared off the face of the earth, but when he was at Swansea he got a Spain call-up, he played for Spain, and you don't get Spanish call-ups if you can't play football."