Anton Ferdinand and brother Rio were among a number of other players who also refused to wear the T-shirts last weekend.
Roberts has offered suggestions for ways to tackle racism and believes English football should adopt a similar scheme to American Football's 'Rooney Rule' in the United States.
The Rooney Rule, established in 2003, requires NFL teams to interview one black or ethnic minority candidate for any head coach or senior football operation positions that become available, as part of a transparent and open recruitment process.
"I know the PFA have been very strong on this particular issue and have done a lot of work behind the scenes," Roberts told BBC South Today.
"I've spoken before about the Rooney Rule and my own personal view is that an equivalent of that on some level would help to give ethnic minority coaches and managers an opportunity to at least be involved in the interview process.
"From a personal point of view, I think it will be a good thing, but whether the PFA will be able to help make that happen we'll have to wait to see. But on this particular issue, their work has been outstanding.
"If you look at the impact it has had in American Football, it shows that if you give people the opportunity to stake their case they are more likely to get the job. But the PFA can only propose it, they cannot put it in place."
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