He ended up joining Southampton for £11million back in 2014 and speaking back in January 2019, Klopp admitted that not signing Mane for Dortmund was his “biggest mistake”.
“The time I have spent with Sadio Mane has been fantastic – I love the boy! He’s an outstanding player,” Klopp said at the time.
“I have made a few mistakes in my life and one of my biggest mistakes ever was not taking Sadio when I was at Dortmund.
“We were together in an office and I spoke to him. Afterwards I wasn’t sure but that was really my fault.
“He’s an outstanding boy and life gave me a second chance to work with him and hopefully we can both use it.”
source: express.co.uk