Suso became Hearts' latest summer signing on Tuesday
Hearts have given a trial to German attacking midfielder Tibor Heber.
The 23-year-old has been playing for Bundesliga 2 side Alemannia Aachen, one of the opponents on the Edinburgh club's upcoming German tour.
He will be hoping to follow Spanish winger Suso Santana, who joined Hearts on Tuesday after leaving Tenerife.
Both players and former Inverness midfielder Ian Black will join the Hearts squad when they begin pre-season training on Thursday.
And manager Csaba Laszlo stressed that nobody is assured of a place in his team despite their third-place finish in the Scottish Premier League last season.
At this moment, everybody gets their chance and, if they use it, they keep their place in the team
Hearts manager Csaba Laszlo
"Next season will be a new team and new chances for everybody," he told Hearts' website.
"At this moment, everybody gets their chance and, if they use it, they keep their place in the team.
"That is how football works. You give someone the opportunity and it is up to them to take it. Then we go from there."
Laszlo had already indicated that he would use their German training camp as a way of choosing a new club captain.
He hoped that a new leader would emerge following defender Robbie Neilson's summer switch to Leicester City.
Meanwhile, Hearts new signing Suso said he had to wait for six months before Hearts concluded a deal to bring him to Tynecastle.
Laszlo declared his interest in the player as far back as December last year, but the three-year deal was only concluded this week.
"Until two weeks there was nothing concrete but I am delighted to be here after first hearing about the club's interest back in December," Suso told the Hearts website.
"It was an important decision for me to leave Spain but not a difficult one.
"I know the game in this country is very physical and I know I will have to learn quickly.
"Football is football, though, and the physical side of things doesn't bother me a big deal.
"My main objective is to work as hard as I can and bring success to the club."
Elsewhere, several clubs have made enquiries about Hearts' Andrew Driver.
However, it is believed that no firm offers have yet been received for the winger who this summer became an England Under-21 international.
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