This is very dangerous thinking. Didn't he also have a brilliant performance at full back against Liverpool a couple of seasons ago? Then not get much of a look in after that, particularly against lower sides...
Also, look at the infamous 'summer of no signings' - if I recall correctly, we started the next season really well, were flying pretty high by September, causing some people to say 'haha you see, we didn't need any new players after all' - then look what happened over the next following 12 months...
One good game, whether for a team or an individual player, should have no impact on transfer plans.