Lucas arrives having made just 5 substitute appearances totalling 72 minutes of on-field action this season in Ligue 1 - things were made particularly hard for him with the summer arrivals of Neymar and Kylian Mbappe.
"I'm sad, because he's a good friend, he's a quality player who was rarely used. He is going to make the effort to adapt to our philosophy, and I think he is a player that can adapt completely". He's my brother in football.
"I don't want to say yes or no, but I don't believe it'll be possible for him to be available".
What's vital though is that the Brazil global injects speed and trickery to the Spurs attack line, a trait that the team lacks, particularly following Georges-Kevin Nkoudou's move to Burnley.
The arrival of his compatriot and friend Neymar at the Parc des Princes this season left the 25-year-old struggling for first-team opportunities under Unai Emery but he now comes in to bolster Tottenham's ambitions at home and overseas. "For me, he should never have left Paris".
Neymar, however, speaking after PSG's win over Rennes on Tuesday, lamented Lucas's impending departure to Spurs.
Speaking to offtheball.com, he said: "I think they're looking at somebody around that €20-25-30m".
"We are going in the last few days to see if we can add players that add good quality", Tottenham head coach Mauricio Pochettino said in the wake of their 1-1 draw with Newport at the weekend. I know people will talk about that but they have to put themselves in my shoes. "To imagine him leaving, it's the end of an era, but he's a friend I'll keep for life, even from afar, wishing him the best". "The team is more mature, more experienced, we're stronger in different aspects", he explained. Why will not I do it with my opponents?