The Tottenham Hotspur defender may be a good option for Aston Villa, Liverpool or Manchester United if he does leave White Hart Lane.
Walker has struggled with injuries in recent times and the 25-year-old managed just 21 senior appearances last season after recovering from a long-term injury only to be side-lined again in early April.
Along with Trippier, Tottenham also have DeAndre Yedlin, Eric Dier and Vlad Chiriches on their books, all of whom can all play at right-back if required, so if Walker did move on, where could he go?
Here we take a look at three potential destinations for the England international:
Back in 2011, Walker enjoyed a very successful spell on loan at Aston Villa and if he is available this summer, manager Tim Sherwood may be on high alert.
When fully fit, Walker is a fine right-back and he could bring plenty of quality to a Villa side in need of reinforcements this summer.
Tottenham may not want to do business with a direct rival for a top-four finish but the simple fact is Liverpool need a new out-and-out right-back and Walker could be the perfect option.
With 155 appearances for Spurs under his belt he is certainly experienced and with Glen Johnson leaving this summer what chance a surprise move for Walker?
Manchester United are another side in desperate need of a new right-back with Rafael out of favour under manager Louis van Gaal and Antonio Valencia the only viable alternative for now.
There would be a risk involved for any side signing a player who has been injured for so long, but United may see it as a risk worth taking.