Flying winger Riccardo Calder has already given his new Dundee team-mates a fright in training.
And Dark Blues manager Paul Hartley is hoping that opposition Premiership full-backs get the same treatment.
The on-loan Aston Villa wideman has made a big first impression, Hartley revealed.
And he expects 19-year-old Calder’s pace to be a big asset in his four months at Dens Park.
“Riccardo has been absolutely brilliant in the couple of days he’s spent with us so far,” Hartley explained.
“I’m really pleased. He’s a very positive player. He’s got good pace about him and we’re very happy to have got him.
“He’s been at Villa for the last 10 years and has come through a good system.
“I’m really excited about him. He scared a couple of our defenders this morning, that’s for sure!
“Every time he got the ball we just encouraged him to be a positive as he can.
“He’s got genuine pace, and there was quality at the end of it.
“You don’t see pace as much in wide players these days. You don’t see traditional wide players as much in the game.
“We’ve looked far and wide for one and Riccardo comes highly recommended.”
Calder, who has been an unused substitute on the Villa first team bench and a regular in their under-21 side, has had two days’ training in Tayside.
Yesterday was fellow loan signing Rhys Healey’s first day at school.
But Hartley also has high hopes for the Cardiff City striker.
The 20-year-old came through the youth ranks at Welsh Premier League side Connah’s Quay Nomads before earning a move to Cardiff, where he made his debut in the last game of the 2014/15 season against Chelsea.
The Englishman was loaned to Colchester for part of last season.
“He’s on a four-year deal at Cardiff and has been on loan at Colchester,” Hartley said.
“His name was on our radar last year and it came up again. He’s looked really sharp as well.
“His movement looks good and he’s linked up well with the other strikers here.
“Both of the boys are looking forward to the challenge.
“The two of them will be involved straight away.
“They’re looking to get more game time. They’re not used to first team football and we’re giving them a platform. This is there opportunity to play real games.”
Hartley is happy with the balance of his squad after the two late additions.
“I felt we were a wee bit short in the attacking third over the last couple of weeks,” he pointed out.
“With Rory (Loy) being out our bench has been weak as well.
“I’ve got another player for wider areas and competition through the middle with Riccardo and Rhys.”