Trainer Luca Cumani hopes fellow Italian Frankie Dettori can put his six-month suspension behind him as soon as possible for the good of racing.
The three-times British champion jockey, 41, tested positive for what is believed to be cocaine following a routine examination at Longchamp on September 16.
Cumani gave Dettori his first job in British racing as an apprentice in 1985 before he went on to become the Newmarket trainer's stable jockey, enjoying great success together before Dettori moved on to become retained jockey to Sheikh Mohammed's operation Godolphin.
Cumani told Press Association Sport: "I'm sad that this has happened and hope it doesn't happen again. He is the best jockey that has been around for quite a while and a great ambassador for the sport.
"He has done a world of good to the sport and let's hope he can put this behind him quickly and go back to where he was."
The Professional Jockeys Association intend to look at the mental well-being of their members and give riders any support they might require.
Paul Struthers, PJA chief executive, said: "As in any walk of life jockeys will make mistakes. Frankie Dettori has made such a mistake and accepted the consequences of it, and if he needs any support the PJA and Injured Jockeys Fund between them can provide that.
"The wider issue of jockeys' mental well-being is something the PJA cares passionately about.
"As well as all the normal pressures that other sportsmen and women have to contend with, unlike many other sports jockeys have the added pressures of massively reduced calorific intake and are constantly at very real risk of serious injury.
"Jockeys in Great Britain have an excellent support structure in place in many respects. This is true when it comes to mental well-being, but whilst the support is there, racing perhaps lags behind other sports particularly when it comes to raising awareness of the issues and the support that is available, and it is overdue that more was done."
17 December 2014Kauto pleases in Olympia display
Mullins eyes twin assault on Lexus
Value oozes class in Newbury romp
Annie Power on road to recovery
Spencer strikes after U-turn
Vautour ready for next jumps test
Mullins banks on Faugheen progress
Victory set to skip Ladbroke
Sidelined Brian misses Whittle
Mullins: Fever can go the distance
Sceaux to sidestep Haydock raid
Square season derailed by injury
Lexus a non-starter for Clouds
Europe return hinges on ground
Injury woe for Cookson
Plans on hold for Topper
Appeal success for Russell/Enright
Mulholland makes Master plan
Cango makes Catterick impression
Field sizes under BHA microscope
Quinn outlines Aurore options
Legal laying down the law at Ludlow
Ground dictates Attaglance plans
King heartened by Walkon return
Cross set Christmas conundrum
16 December 2014Pipe bowled over by Palace
Cole to duck Leopardstown mission
Pipe bowled over by Palace
Arbuthnot has Starluck options
Geraghty taken with weekend Heroes
Moore the merrier at Plumpton
Estrella back with a bang
Options fluid for Hargam
Lough set for Lexus workout
Sceaux in Haydock frame
Victoire at Ladbroke summit
Five left in Long Walk
15 December 2014Hannon has trio lined up for Dubai
Sherwood sweats on Power Welsh bid
Puffin angling for Ascot return
Kauto takes the plunge at Olympia
River looks swell for Theatre
Ginge team ponder Plate target
View sights fixed on Kempton prize
Sole to stick to trusted routine
Spencer in retirement U-turn
Elliott keen to play waiting game
Pineau pulled up at Carlisle
Heroes steps up in thriller
Estrella returns at Wolves
New camp delay Christmas call
Not a bother on Berlais
Farraaj sixth in Hong Kong Cup
Flintshire comes good in Vase
14 December 2014Heroes steps up in thriller
Willing Able streaks to Mile glory
National hero on duty at Carlisle
Irish duo grounded by Aero
Irish duo grounded by Aero
Southwell cancels inspection
No issues at Carlisle
Ruby a Cheltenham winner again
December joy for cool Virak
Special One lands International
Peace dazzles at Doncaster
Frankie claims Caspian Gold
Not much fizz from Champagne
Henderson concerns for Simon
Sprinter camp lean towards Ascot
No Trial and error for Hargam