In a recent interview conducted by Sport Magazine, Chelsea defender Cesar Azpilicueta has lauded the impact made by summer additions Diego Costa and Cesc Fabregas.
A new face at Stamford Bridge just two seasons prior to the duo's arrival, Azpilicueta clearly holds his new team-mates in high regard.
"I knew they were good additions to the team," he said when quizzed about the Spanish duo. "They're getting very good goals and assists and making the team play better."
And the right-back, nicknamed 'Dave' by his team-mates, reserved special praise for Costa, the man whose goals have been integral to the Blues' impressive early-season form.
"Costa is a strong player. He holds the ball, he can shoot with the right foot and the left foot. I think he is a complete player who can make the difference at any moment. You cannot give him any space."
Despite a lingering hamstring complaint, Costa has struck ten goals in his first nine Premier League games since his £32 million move from La Liga champions Atletico Madrid.
Having accounted for over a third of the league leader's domestic goals, one would consider the Brazilian-born Spaniard money well spent.
Meanwhile, Cesc Fabregas has contributed nine assists to the Blues' title challenge.
The summer signing of the former Arsenal man has revolutionised Chelsea’s midfield. Partnering Nemanja Matic - he has started every league game alongside the Serbian - the Spanish playmaker has added a new level of consistency in attack, while replacing the experience left by the departure of Frank Lampard.
After initial injury fears, which saw the duo remain absent from international duty last week, both Costa and Fabregas are expected to be available for Chelsea this weekend, with Jose Mourinho's side looking to extend their unbeaten run against West Brom.
As the Blues approach a busy run of fixtures during the Christmas period, the Spanish pair will be instrumental to the club's chances of reaching 2015 with their impressive record in-tact.