The Brazilian had to wait until August to make his first competitive appearance of the year after suffering a serious knee injury at the end of 2011. But in just the second Premier League match of Liverpool's season Lucas picked up a thigh injury and was ruled out for another three months, leaving him to cut a dejected figure on the sidelines again.
"This is the worst year of my career and of my life as well. When we can't do what we like to do and perform your job, it's always a bit frustrating," the 25-year-old told Sportv.
Despite a slow start to his career at Anfield, Lucas has been able to establish himself as a key player in the Reds' midfield, but the double injury blow has dealt him a significant setback. He added:
"Everything is a bit new to me because I have never had so many injuries. Two in a row is very complicated."
"We tried to stay positive when the first one happened, but the second one was much tougher as it happened so close to the other one."
New Liverpool recruit Nuri Sahin, meanwhile, has spoken of his happiness at registering his first goals for his new club in their victory over West Brom. Sahin scored a first-half equaliser before a second 10 minutes from time ensured that Liverpool progressed to the fourth round of the Capital One Cup. It was Sahin's first domestic victory at his new club, and the Turkish midfielder was happy with the character shown by an inexperienced side.
"We played with a young side and they showed a lot of character, especially to come back from 1-0 down and they did very well," Sahin told the club's official website
"It was a good night for the club and I was happy to see the young players get their chance and show what they can do. I was impressed with Jack Robinson who did well at left-back but to be fair they all did very well."
Liverpool travel to Norwich City on Saturday looking for their first league win of the season.