Kieran Tierney would be a welcome signing for Arsenal, but they need to bring in two centre-backs "immediately", says Charlie Nicholas. Sky Sports News understands that a £15m bid for Tierney was rejected by Celtic over the weekend, but an improved offer from the Premier League side is expected in the coming days. Nicholas praised the 22-year-old but was also cautious in his optimism. He told the Transfer Talk Podcast: "He's got real power, real pace going forward. He's turned into a very exciting full-back over the years and he's vastly improved. "There is a question mark about his defensive frailties but then again he would be an improvement for Arsenal there's no...
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