Celtic have made contact with Brondby over the availability of 23-year-old Bosnia and Herzegovina midfielder Benjamin Tahirovic. The Scottish Premiership club are looking to strengthen their midfield ahead of the new season. Tahirovic has been in impressive form for Brondby, scoring several goals and providing assists. Celtic manager Martin O'Neill is a big fan of the midfielder and is keen to bring him to Parkhead. Meanwhile, Rangers are showing interest in right-back Bryan Reynolds, who is out of contract with Westerlo next year. The 24-year-old American international is one of several targets for the Glasgow club as they look to replace James Tavernier at right-back. Reynolds has been in good form for Westerlo, and his contract is set to expire next year. Celtic are also in talks with Fulham, Nottingham Forest, and Sunderland over the availability of midfielder Arne Engels, 22. The Scottish Premiership club are looking to strengthen their midfield and are willing to pay a significant transfer fee for the right player. Engels has been in impressive form for Fulham, scoring several goals and providing assists. Celtic manager Martin O'Neill is a big fan of the midfielder and is keen to bring him to Parkhead. The summer transfer window in Scotland will close on 3 September, two days after other territories like England. Celtic are expected to make several signings before the deadline, including Tahirovic and Engels. The club are also looking to strengthen their defense and are in talks with Swansea City over the availability of center-back Stephen Welsh, 26. Welsh has been in impressive form for Swansea City, scoring several goals and providing assists. Celtic manager Martin O'Neill is a big fan of the defender and is keen to bring him to Parkhead. The club are also looking to strengthen their attack and are in talks with Dundee United over the availability of winger Bence Babos, 22. Babos has been in impressive form for Dundee United, scoring several goals and providing assists. Celtic manager Martin O'Neill is a big fan of the winger and is keen to bring him to Parkhead.