Arsenal are in talks to sign Werder Bremen defender Per Mertesacker, with the Germany international's move to Emirates Stadium expected to be confirmed on Wednesday.
Arsenal boss Arsene Wenger has come under pressure to bolster his squad before Wednesday's transfer deadline in the wake of his side's 8-2 Premier League loss at Manchester United on Sunday.
Wenger indicated he is in the market for a centre-back, and several names have been linked, including Mertesacker, who will also provide much-needed height and experience at the back, standing at 6' 6'' and boasting 75 international caps.
Mertesacker, 26, is the captain of the Bundesliga club and it is reported a fee of around £10 million has been agreed to bring the centre-half to Emirates Stadium as he has entered the final 12 months of his contract.
Germany boss Joachim Low said: ''Per contacted me last night and informed me (about Arsenal's interest). I told the player that I would release him for the day.''
Metesacker is now believed to have passed a medical and agreed personal terms with the Gunners.
Fenerbahce left-back Andre Santos is closing on a move, South Korea captain Park Chu-Young is also expected to tie up a deal, while the Gunners have been linked with a host of other names ahead of Wednesday's transfer deadline, including Chelsea trio Florent Malouda, Alex and Yossi Benayoun.
They also last week saw a bid rejected for Bolton's Gary Cahill, a pursuit they may well abandon should a deal for Mertesacker be concluded.