Tony Bin
In the following year the colt was officially Europe's best horse, with a rating of 133 placing him one pound ahead of Miesque and two ahead of the leading middle-distance horses Mtoto and Tony Bin. Following a "recalibration" of historic ratings in 2013, the ratings of all horses in the 1988 classification were moved down by one pound, giving Warning a new official rating of 132. Timeform assigned a rating of 136 to Warning in 1988, making him their highest-rated horse of the year.