"It's very special and it's part of the history of the club. We're proud that these players are part of our dressing room. And personally, I can't wait for them to come back and start working with them," the German head coach said, following Athletic Club's 2-0 win over Sestao River in their third pre-season friendly.
Terzić revealed he has stayed in contact with the three World Cup winners throughout the tournament, explaining the importance of building a relationship with them even from a distance, rather than the players simply hearing his voice for the first time in August.
"For now we just want them to enjoy the moment. It's a very special moment for them, for their families and for us as coaches and as a team," he said, before playing down suggestions of Barcelona interest in a possible move for Laporte.
"I think it's not a new story, maybe with a different name. I'm really looking forward to all these players coming back and starting to work with us," he added, referencing last season's transfer saga involving Nico Williams.
Terzić also gave a positive assessment of the mini pre-season tour against Basque sides from the Tercera and Segunda RFEF that concluded with the Sestao test, saying it had helped the squad "build a physical and tactical foundation" - specifically, in Sestao's case, on set-pieces and offensive corners and throw-ins.
"We're working very hard. It's a very intense period and we consider these matches part of our training. There's still a month to go before we start fighting for points, and we're really excited about the next four weeks as we look to be ready for the start of the season," he explained.
Terzić, however, did not go into detail on the situations of Julen Agirrezabala and Mikel Vesga, the only two fit players yet to feature in the three friendlies so far.
"I said on the first day, we don't talk about individual names. What we're doing is talking to the players, and the most important thing is to have clarity. Today we saw young players getting minutes, and if you want to give them opportunities you need to create space for them to do so. Every player knows their situation at the club. And the most important thing isn't that the public knows it, but that the players do," he explained.