"Depending on the future direction about the club's sporting and economic ambition, we could only consider working with partners who definitely have proof a connection to the club's identity," Jobst underlined.
The 29-year-old midfielder joined the Reds with a reported fee of 20 million pounds (about 25.8 million US dollars) for four years to become the club's second signing of the summer transfer window, following Kostas Tsimikas in August.
After selling Ivan Rakitic to Sevilla, Barca are currently looking to sell striker Luis Suarez, with Juventus a possible destination, while Arturo Vidal is close to joining Inter Milan.
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"Teammates, coaches and management in Beijing, they are quite nice to me, but I still have a dream of playing in the NBA."
Earlier in the day, women's 200m saw Kong Lingwei win with 23.64s as top favorite Ge failed to finish the race.
The 10th seed, the oldest in the Rome Masters draw at 35, lost 6-0, 7-6 (2) to Musetti who is ranked 249th in the world.
Garbine Muguruza, seeded ninth, eased into the final eight. The Spaniard beat Johanna Konta of Great Britain 6-4, 6-1. Enditem
Valencia got a flying start to the season a week ago when they twice fought back from behind before winning 4-2 at home to Levante, and another fightback looked to be on the cards when Maxi Gomez scored an impressive goal in the first minute of the second half following a pass from Daniel Wass.
The battle for the second place remained tight until the final kilometers, as Rio Olympic Games runner-up Cai, representing Team Yunnan, held off a strong challenge from London Olympic champion Chen to finish second in 1:22:03. The 28-year-old Chen of Guangdong trailed nine seconds further behind to take the third place.
The Arsenal captain scored a brace in last season's FA Cup final as Arsenal came from behind to beat Chelsea 2-1. He also netted in Arsenal's 3-0 victory over Fulham last Saturday in their first game of the new Premier League season.
Barca will play newly promoted Elche in the Camp Nou on Saturday a week before they kick off their La Liga campaign at home to Villarreal.