In one of the most unusual transfers of this summer transfer window, Chelsea defender David Luiz is set to move to London rivals Arsenal, just three months after agreeing to a new contract with the Blues.
Furthermore, the Brentford man endured an injury hit campaign last season, and though he has recovered and featured in the Championship's side first game of the season, he could be a risk given the potential of the knee problem reoccurring.
Later in the season, Tierney made his competitive debut for Celtic on 22 April 2015, coming on as an 81st-minute substitute in a Scottish Premiership match against Dundee United.
ARSENAL swooped to make a double defensive deal on transfer deadline day, finally landing Kieran Tierney from Celtic and, in arguably the most shocking signing of the summer, David Luiz from Chelsea. For us, last year, he was very important.
"We had with Laurent Koscielny the first captain, but just five days ago he left".
There has been a mixed response to the player deciding to leave the club with many questioning Kieran's support.
While the summer transfer window for Premier League clubs wanting to buy closed on Thursday, players can still be sold to teams in Europe who have until September 2 to make signings.
"Yesterday we finished the transfer possibility and also we did progressively with some players to sign and also led to some players to leave", he said.
We made a decision to be more competitive in each position, at centre-back with David Luiz, with another player in the middle with [Dani] Ceballos, with Kieran Tierney, with [Nicolas] Pepe.
Tottenham added two players to their ranks, spending 25 million pounds on Fulham midfielder Ryan Sessegnon and bringing Argentina midfielder Giovani Lo Celso on a season-long loan. We will check tomorrow (Saturday).
"The better news is that he's working hard on his fitness and is back out on the pitch".
Manchester City completed the signing of Portugal right-back Joao Cancelo from Juventus on Wednesday. "We want to be strong defensively but above all being an offensive team". "We are going to work and be with a big challenge to compete in this competition to find the top four".