Newcastle have an interest in PAOK defender Dimitrios Giannoulis - but signing a left-back is not a priority at the moment.
Greece international Giannoulis is valued around £4m and is available.
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England international Danny Rose's loan spell at St James' Park ended last month.
Steve Bruce told Sky Sports News on Friday he expects up to four new signings to arrive by the time the new season starts, but admitted he's working with a reduced budget and is scouring the loan market.
Bruce has already recruited Jeff Hendrick on a free transfer after his Burnley contract expired, and secured the services of Matty Longstaff on a new two-year deal.
Summer transfer window - key dates and times
The summer transfer window will run for 10 weeks from July 27 and close at 11pm on October 5.
A domestic-only window for trades between the Premier League and EFL then runs from October 5 and closes on Friday October 16 at 5pm. Follow all the news and analysis on Sky Sports News and across Sky Sports' digital platforms, including with our dedicated Transfer Centre blog.