Bruce believes his own England hopefuls - Tom Huddlestone, Jake Livermore and Curtis Davies - all have a chance of gatecrashing the squad.
The 53-year-old said: "Huddlestone and Livermore have had a sniff of the England set-up before and since Curtis Davies walked through the door, he's had a wonderful first season for us.
"All they can do is keep playing well and keep knocking on the door. There's always one or two shocks, there's a long way to go before the World Cup and injuries can set in."
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