Roberto Mancini is wary of Manchester City making another slow start in the Premier League as they prepare to kick-off their campaign against newly promoted Swansea.GettyImagesIt stinks: Roberto Mancini has been frustrated by the failure to complete his squad by the start of the season• Mancini frustrated by Nasri delay• Mancini expects Tevez to stay• Manchester City season previewMancini complained last week that his squad was not yet complete just days out from the start of the season as City continue their pursuit of Arsenal star Samir Nasri. The Italian followed this rant by suggesting the unfinished squad could get out of the blocks in shaky fashion, as they did last campaign, making their dream of a Premier League title that much more