Dundee and Queen of the South agree a compensation package for left-back Kevin Holt's switch to Dens Park.
Dundee United hand amateur Luis Zwick a professional contract and say he will contend for the first team.
Gary Mackay-Steven scored one and created the other as Celtic began their pre-season campaign with an impressive 2-0 friendly win over Den Bosch.
Highly-rated Swiss fullback Saidy Janko became Scottish champions Celtic's second signing of the close season on Wednesday when he agreed to move from Manchester United on a four-year deal.
Preview followed by live coverage of Thursday's Europa League qualifier between Alashkert and St Johnstone.
Celtic sign 19-year-old Swiss right-back Saidy Janko from Manchester United, subject to a successful medical.
Celtic have signed defender Saidy Janko from Manchester United on a four-year deal, for an undisclosed fee.
CELTIC have completed the deal to full-back Saidy Janko from Manchester United.