The Mexico international has talked up his brother's chances of becoming a first team regular for the Blaugrana, and is looking forward to taking on his former club in November.
Giovani, 23, opted to leave Barca for Tottenham Hotspur in the summer of 2008 in an attempt to get regular first-team action elsewhere, but he has urged Jonathan, 22, not to walk the same path and remain patient.
"The best thing he can do is be patient," Giovani told Goal.com Spain reporter Pilar Suarez. "I believe he will get opportunities. He is a very talented player and he must be focused on learning as much as he can. I think he will show he can have a place in the first team."
Jonathan, a midfielder, has spent his entire youth and professional career in the Barcelona system, but he has made only a handful of appearances for the first team over the past four seasons. He was linked to moves to Spanish clubs Sevilla, Malaga and Real Betis over the summer before deciding to stay put.
Meanwhile, Giovani forced his way out of Tottenham after featuring very rarely since joining the Premier League club in 2008. He did, however, impress while on loan with Racing Santandar for six months in 2011 and led Mexico to an Olympic gold medal before ending up with Mallorca last August.
"There have always been rumors about my future. I heard about Sevilla, Málaga... I didn't even know if those were true or false," Giovani said. "Sevilla's interest was real because they were in contact with me, but in the end it didn't happen because they couldn't come to an agreement with my old club. Anyway, I'm at Mallorca now and that's the only thing I care about."
The son of Brazilian footballer Zizinho praised his new team, as well as manager Joaquin Caparros, who has spoken highly of Giovani upon his arrival to the club this August.
"Caparros is a thorough boss who has always treated me well. Since I arrived he's had a lot of confidence in me," Dos Santos noted. "He's a manager who likes to win, tries to get the best out of his players and I'm very happy to be at his disposal."
Giovani will face his brother's squad in La Liga action on Nov. 11 and understands that Mallorca will have to be flawless to have a chance against the club that features two-time Golden Boot winner Lionel Messi.
"Barcelona is the best team now," Giovani said. "They have great players and we will have to work very hard this week, study them well and play better than perfectly if we want to beat them."
Giovani has made two appearances for Los Bermellones so far this term, including featuring in last weekend's 5-0 loss to Real Madrid. As he adjusts, he hopes his new club will find a way to get back on track after opening the year with only three wins in nine games.
"As a professional, you always hop on the pitch with the idea that you can win. We knew we were playing against a great team in Real Madrid. It was a tough game against them. We just have to learn about our mistakes, face our upcoming Copa del Rey match and try to change the bad streak we are going through."