They felt fine after Wed's 10-lapper but yesterday it grew progressively painful when toeing off. The pain stemmed from using the pair of racing shoes - adidas Sympathy. Not only is the pair poor fitting (I bought 1/2 size too small), the forefoot cushioning is quite deficient.
A check online suggested that it may be Sesamoiditis which will sideline me for a week. If the pain doesn't go off by Monday, I'll have to pay the podiatrist a visit.
Good reference: Podiatry Channel