Grella came close to joining Turkish giants Galatasaray over the summer, but is delighted to have been given a second chance at Ewood Park.
“Obviously after not showing what your true potential is, you always want to stay and prove people wrong,” the 31-year-old told the Lancashire Telegraph.
“There are a lot of people who have probably thought that it was a waste of time and money to bring me here, so I’m always trying to change that around.
“I still have another year’s contract. I would like to see that out and then we’ll see where we go from there.
“The Galatasaray stuff never really worried me too much. I knew my position at Blackburn and to be fair I’ve always been happy here.
“It was done more with other people than myself. I was at the World Cup so I was only getting relayed to me at what stage the negotiations were.
“I was more interested in doing well with my national team and I was hoping that if anything was going to be done to organise it after the World Cup.”